Library

Browse and search novels

100 novels found

Pistol Technology Knowledge (part 1) (military Firearms Technology That is an Eye-opener for Teenagers)

Compiled By Feng Wenyuan

41K0

Firearms are the most important individual combat weapons in modern warfare. With the development of information warfare, the types and technologies of firearms are constantly developing and changing. From the birth of the first revolver, to the submachine gun produced to adapt to trench fighting, from the emergence of the first automatic pistol, to the powerful flames emitted by the mini machine gun, etc., Firearms are showing the power of modern technology with increasingly perfect structural designs and increasingly powerful functions. Unveil the mystery of modern firearms and it will be an eye-opener for you!

Shotgun Technology Knowledge (part 2) (military Firearms Technology That is Eye-opening for Teenagers)

Compiled By Feng Wenyuan

33K0

Firearms are the most important individual combat weapons in modern warfare. With the development of information warfare, the types and technologies of firearms are constantly developing and changing. From the birth of the first revolver, to the submachine gun produced to adapt to trench fighting, from the emergence of the first automatic pistol, to the powerful flames emitted by the mini machine gun, etc., Firearms are showing the power of modern technology with increasingly perfect structural designs and increasingly powerful functions. Unveil the mystery of modern firearms and it will be an eye-opener for you!

Mine Clearing Vehicle Technological Knowledge (part 1) (the Most Shocking Armored Combat Vehicle Technology)

Compiled By Feng Wenyuan

43K0

Military science is a comprehensive science with a wide scope and rich content. It involves many disciplines such as natural science, social science and technical science. Military science focuses on high-tech warfare. Learning modern military high-tech knowledge enables us to understand the frontiers of modern science and technology, understand the situation of weapons development, broaden our horizons, increase knowledge, and cultivate our sense of worry and patriotism, so that we can continue to learn scientific and cultural knowledge to build our strong country and use it as our strong spiritual force.

Laser Weapon Technology Knowledge (part 1) (cutting-edge Weapon Technology That Young People Are Highly Concerned About)

Compiled By Feng Wenyuan

41K0

With the rapid development and widespread application of modern high and new technologies, it is triggering military changes worldwide, and cutting-edge weapons are constantly being produced. Cutting-edge weapons refer to new weapons that are fundamentally different from traditional weapons in terms of basic principles, lethality and destructive power, and combat methods. They are new weapons that are under development or exploration.

Special Tank Technology Knowledge (part 2) (the Most Shocking Armored Combat Vehicle Technology)

Compiled By Feng Wenyuan

35K0

Tanks are the main weapon in modern land combat and are known as the "King of Land Warfare". They are usually equipped with a cannon and multiple automatic weapons, and some are equipped with armor-piercing projectiles. They have strong direct firepower, high cross-country mobility, and extremely strong armor protection and assault capabilities. They are mainly used to fight against tanks or other armored vehicles. They can also suppress and eliminate anti-tank weapons, destroy fortifications, and annihilate enemy forces.

Technical Knowledge of Special Submachine Guns (part 2) (military Firearms Technology is an Eye-opener for Teenagers)

Compiled By Feng Wenyuan

42K0

Understand the situation of weapons development, broaden our horizons, increase our knowledge, and cultivate our sense of urgency and patriotism, so that we can continue to learn scientific and cultural knowledge to build our strong country and use it as our strong spiritual force.

Chemical Weapons Science and Technology Knowledge (part 1) (cutting-edge Weapons Technology That Young People Are Highly Concerned About)

Compiled By Feng Wenyuan

41K0

With the rapid development and widespread application of modern high and new technologies, it is triggering military changes worldwide, and cutting-edge weapons are constantly being produced. Cutting-edge weapons refer to new weapons that are fundamentally different from traditional weapons in terms of basic principles, lethality and destructive power, and combat methods. They are new weapons that are under development or exploration.

Knowledge of Ground-attack Artillery Technology (part 2) (the Most Amazing Ammunition and Artillery Technology for Teenagers)

Compiled By Feng Wenyuan

37K0

Ammunition is generally composed of a warhead, a projection and a stabilizing part. It is the core part of the weapon system and is the ultimate means to launch or drop the weapon into the target area to complete the established combat mission. The caliber of the weapon fired from the barrel is often used to indicate its size. It has the characteristics of large muzzle velocity, high shooting accuracy, and strong economy. It is mainly used to suppress enemy firepower, kill living targets, and destroy fortifications, tanks, and other technical equipment.

Special Ship Technology Knowledge (part 2) (ship and Aircraft Carrier Technology That Teenagers Must Know)

Compiled By Feng Wenyuan

47K0

Ships, commonly known as warships, refer to naval vessels equipped with weapons and equipment that can perform combat missions in the ocean. They are the main equipment of the navy. Ships are mainly used for maritime mobile operations, conducting strategic nuclear raids, protecting one's own or destroying enemy sea lines of communication, conducting blockades or counter-blockades, participating in landing or anti-landing operations, and undertaking support services such as maritime supply, transportation, repair, life-saving, medical care, reconnaissance, investigation, surveying, engineering and testing.

Military Aviation Science and Technology Knowledge (part 1) (military Aerospace Science and Technology Broad Vision)

Compiled By Feng Wenyuan

42K0

Ships, commonly known as warships, refer to naval vessels equipped with weapons and equipment that can perform combat missions in the ocean. They are the main equipment of the navy. Ships are mainly used for maritime mobile operations, conducting strategic nuclear raids, protecting one's own or destroying enemy sea lines of communication, conducting blockades or counter-blockades, participating in landing or anti-landing operations, and undertaking support services such as maritime supply, transportation, repair, life-saving, medical care, reconnaissance, investigation, surveying, engineering and testing.

New Concept Weapon Technology Knowledge (part 1) (cutting-edge Weapon Technology That Young People Are Highly Concerned About)

Compiled By Feng Wenyuan

52K0

With the rapid development and widespread application of modern high and new technologies, it is triggering military changes worldwide, and cutting-edge weapons are constantly being produced. Cutting-edge weapons refer to new weapons that are fundamentally different from traditional weapons in terms of basic principles, lethality and destructive power, and combat methods. They are new weapons that are under development or exploration.

Shotgun Technology Knowledge (part 1) (military Firearms Technology That is an Eye-opener for Teenagers)

Compiled By Feng Wenyuan

39K0

Firearms are the most important individual combat weapons in modern warfare. With the development of information warfare, the types and technologies of firearms are constantly developing and changing. From the birth of the first revolver, to the submachine gun produced to adapt to trench fighting, from the emergence of the first automatic pistol, to the powerful flames emitted by the mini machine gun, etc., Firearms are showing the power of modern technology with increasingly perfect structural designs and increasingly powerful functions. Unveil the mystery of modern firearms and it will be an eye-opener for you!

Bomber Science and Technology Knowledge (part 2) (military Aerospace Science and Technology Broad View)

Compiled By Feng Wenyuan

45K0

Military aircraft are the general term for aircraft that directly participate in combat, support combat operations and military training. They are the main technical equipment of the Air Force.

Mine Clearing Vehicle Technological Knowledge (part 2) (the Most Shocking Armored Combat Vehicle Technology)

Compiled By Feng Wenyuan

44K0

Military science is a comprehensive science with a wide scope and rich content. It involves many disciplines such as natural science, social science and technical science. Military science focuses on high-tech warfare. Learning modern military high-tech knowledge enables us to understand the frontiers of modern science and technology, understand the situation of weapons development, broaden our horizons, increase knowledge, and cultivate our sense of worry and patriotism, so that we can continue to learn scientific and cultural knowledge to build our strong country and use it as our strong spiritual force.

Technical Knowledge of Special Submachine Guns (part 1) (military Firearms Technology is an Eye-opener for Teenagers)

Compiled By Feng Wenyuan

40K0

Understand the situation of weapons development, broaden our horizons, increase our knowledge, and cultivate our sense of urgency and patriotism, so that we can continue to learn scientific and cultural knowledge to build our strong country and use it as our strong spiritual force.

New Concept Weapon Technology Knowledge (part 2) (frontier Weapon Technology Highly Concerned by Teenagers)

Compiled By Feng Wenyuan

52K0

With the rapid development and widespread application of modern high and new technologies, it is triggering military changes worldwide, and cutting-edge weapons are constantly being produced. Cutting-edge weapons refer to new weapons that are fundamentally different from traditional weapons in terms of basic principles, lethality and destructive power, and combat methods. They are new weapons that are under development or exploration.

Patrol Aircraft Scientific and Technological Knowledge (part 2) (military Aerospace Technology Perspective)

Compiled By Feng Wenyuan

42K0

Military aircraft are the general term for aircraft that directly participate in combat, support combat operations and military training. They are the main technical equipment of the Air Force.

Biological Weapons Technology Knowledge (part 2) (cutting-edge Weapons Technology That Young People Are Highly Concerned About)

Compiled By Feng Wenyuan

45K0

With the rapid development and widespread application of modern high and new technologies, it is triggering military changes worldwide, and cutting-edge weapons are constantly being produced. Cutting-edge weapons refer to new weapons that are fundamentally different from traditional weapons in terms of basic principles, lethality and destructive power, and combat methods. They are new weapons that are under development or exploration.

Knowledge of Modern Military Vehicle Technology (part 1) (the Most Shocking Armored Combat Vehicle Technology)

Compiled By Feng Wenyuan

39K0

Military science is a comprehensive science with a wide scope and rich content. It involves many disciplines such as natural science, social science and technical science. Military science focuses on high-tech warfare. Learning modern military high-tech knowledge enables us to understand the frontiers of modern science and technology, understand the situation of weapons development, broaden our horizons, increase knowledge, and cultivate our sense of worry and patriotism, so that we can continue to learn scientific and cultural knowledge to build our strong country and use it as our strong spiritual force.

Pistol Technology Knowledge (part 2) (military Firearms Technology is an Eye-opener for Teenagers)

Compiled By Feng Wenyuan

42K0

Firearms are the most important individual combat weapons in modern warfare. With the development of information warfare, the types and technologies of firearms are constantly developing and changing. From the birth of the first revolver, to the submachine gun produced to adapt to trench fighting, from the emergence of the first automatic pistol, to the powerful flames emitted by the mini machine gun, etc., Firearms are showing the power of modern technology with increasingly perfect structural designs and increasingly powerful functions. Unveil the mystery of modern firearms and it will be an eye-opener for you!

Knowledge of Modern Military Vehicle Technology (part 2) (the Most Shocking Armored Combat Vehicle Technology)

Compiled By Feng Wenyuan

42K0

Military science is a comprehensive science with a wide scope and rich content. It involves many disciplines such as natural science, social science and technical science. Military science focuses on high-tech warfare. Learning modern military high-tech knowledge enables us to understand the frontiers of modern science and technology, understand the situation of weapons development, broaden our horizons, increase knowledge, and cultivate our sense of worry and patriotism, so that we can continue to learn scientific and cultural knowledge to build our strong country and use it as our strong spiritual force.

Knowledge of Surface Artillery Technology (part 1) (the Most Amazing Ammunition and Artillery Technology for Teenagers)

Compiled By Feng Wenyuan

45K0

It comprehensively introduces the development, development, models, performance, uses, etc. Of corresponding ammunition and artillery types. Therefore, it is highly systematic, informative, popular science and cutting-edge. It is not only a reading book for readers to learn the scientific knowledge of modern ammunition and artillery, but also a treasured version for libraries at all levels.

Knowledge of Modern Tank Technology (part 2) (the Most Shocking Armored Combat Vehicle Technology)

Compiled By Feng Wenyuan

42K0

Tanks and chariots are the basic types of weapons. By studying the scientific knowledge of tanks and chariots, we can learn the basic knowledge about weapons.

Knowledge of Anti-aircraft Artillery Technology (part 1) (the Most Amazing Ammunition and Artillery Technology for Teenagers)

Compiled By Feng Wenyuan

33K0

It comprehensively introduces the development, development, models, performance, uses, etc. Of corresponding ammunition and artillery types. Therefore, it is highly systematic, informative, popular science and cutting-edge. It is not only a reading book for readers to learn the scientific knowledge of modern ammunition and artillery, but also a treasured version for libraries at all levels.

Main Battle Tank Technological Knowledge (part 2) (the Most Shocking Armored Combat Vehicle Technology)

Compiled By Feng Wenyuan

41K0

Tanks are the main weapon in modern land combat and are known as the "King of Land Warfare". They are usually equipped with a cannon and multiple automatic weapons, and some are equipped with armor-piercing projectiles. They have strong direct firepower, high cross-country mobility, and extremely strong armor protection and assault capabilities. They are mainly used to fight against tanks or other armored vehicles. They can also suppress and eliminate anti-tank weapons, destroy fortifications, and annihilate enemy forces.

Laser Weapon Technology Knowledge (part 2) (cutting-edge Weapon Technology That Young People Are Highly Concerned About)

Compiled By Feng Wenyuan

47K0

With the rapid development and widespread application of modern high and new technologies, it is triggering military changes worldwide, and cutting-edge weapons are constantly being produced. Cutting-edge weapons refer to new weapons that are fundamentally different from traditional weapons in terms of basic principles, lethality and destructive power, and combat methods. They are new weapons that are under development or exploration.

Technical Knowledge of Trainer Aircraft (part 1) (military Aerospace Science and Technology Perspective)

Compiled By Feng Wenyuan

40K0

Military aircraft are the general term for aircraft that directly participate in combat, support combat operations and military training. They are the main technical equipment of the Air Force.

Special Gun Technology Knowledge (part 2) (the Most Amazing Ammunition and Artillery Technology for Teenagers)

Compiled By Feng Wenyuan

42K0

Ammunition is generally composed of a warhead, a projection and a stabilizing part. It is the core part of the weapon system and is the ultimate means to launch or drop the weapon into the target area to complete the established combat mission. The caliber of the weapon fired from the barrel is often used to indicate its size. It has the characteristics of large muzzle velocity, high shooting accuracy, and strong economy. It is mainly used to suppress enemy firepower, kill living targets, and destroy fortifications, tanks, and other technical equipment.

Infantry Fighting Vehicle Technological Knowledge (part 1) (the Most Shocking Armored Combat Vehicle Technology)

Compiled By Feng Wenyuan

42K0

No matter what kind of weapon, it is a tool used for attack and has the function of deterrence and defense. It has a huge mystery since ancient times and is the favorite of the majority of military enthusiasts. In particular, the science and technology of weapons is very advanced and often leads the rapid development of science and technology.

Firearms Technology Knowledge (part 2) (military Firearms Technology Eye-opening for Teenagers)

Compiled By Feng Wenyuan

47K0

Firearms are the most important individual combat weapons in modern warfare. With the development of information warfare, the types and technologies of firearms are constantly developing and changing. From the birth of the first revolver, to the submachine gun produced to adapt to trench fighting, from the emergence of the first automatic pistol, to the powerful flames emitted by the mini machine gun, etc., Firearms are showing the power of modern technology with increasingly perfect structural designs and increasingly powerful functions. Unveil the mystery of modern firearms and it will be an eye-opener for you!

Carbine Technology Knowledge (part 2) (military Firearms Technology That is an Eye-opener for Teenagers)

Compiled By Feng Wenyuan

41K0

Firearms are the most important individual combat weapons in modern warfare. With the development of information warfare, the types and technologies of firearms are constantly developing and changing. From the birth of the first revolver, to the submachine gun produced to adapt to trench fighting, from the emergence of the first automatic pistol, to the powerful flames emitted by the mini machine gun, etc., Firearms are showing the power of modern technology with increasingly perfect structural designs and increasingly powerful functions. Unveil the mystery of modern firearms and it will be an eye-opener for you!

Technical Knowledge of Trainer Aircraft (part 2) (military Aerospace Science and Technology Perspective)

Compiled By Feng Wenyuan

40K0

Military aircraft are the general term for aircraft that directly participate in combat, support combat operations and military training. They are the main technical equipment of the Air Force.

Thunder and Artillery Technology Knowledge (part 1) (the Most Amazing Ammunition and Artillery Technology for Teenagers)

Compiled By Feng Wenyuan

42K0

Ammunition and artillery are the basic type of weapons. If we study the scientific knowledge of ammunition and artillery, we can learn the basic knowledge of weapons. This can not only enhance our basic military quality, but also enhance our basic military science knowledge. In the artillery family with many members, the howitzer has a special status. The muzzle velocity of the howitzer is relatively small and the firing angle is relatively large, up to about 75°. The impact angle of the projectile when it flies to the target area is also relatively large, which has better blasting and killing effects.

Fighter Science and Technology Knowledge (part 2) (military Aerospace Science and Technology Broad View)

Compiled By Feng Wenyuan

43K0

Military aircraft are the general term for aircraft that directly participate in combat, support combat operations and military training. They are the main technical equipment of the Air Force.

Biological Weapons Technology Knowledge (part 1) (cutting-edge Weapons Technology That Young People Are Highly Concerned About)

Compiled By Feng Wenyuan

48K0

With the rapid development and widespread application of modern high and new technologies, it is triggering military changes worldwide, and cutting-edge weapons are constantly being produced. Cutting-edge weapons refer to new weapons that are fundamentally different from traditional weapons in terms of basic principles, lethality and destructive power, and combat methods. They are new weapons that are under development or exploration.

Special Submarine Technology Knowledge (part 2) (ship and Aircraft Carrier Technology That Teenagers Must Know)

Compiled By Feng Wenyuan

47K0

Ships, commonly known as warships, refer to naval vessels equipped with weapons and equipment that can perform combat missions in the ocean. They are the main equipment of the navy. Ships are mainly used for maritime mobile operations, conducting strategic nuclear raids, protecting one's own or destroying enemy sea lines of communication, conducting blockades or counter-blockades, participating in landing or anti-landing operations, and undertaking support services such as maritime supply, transportation, repair, life-saving, medical care, reconnaissance, investigation, surveying, engineering and testing.

Special Submarine Technology Knowledge (part 1) (ship and Aircraft Carrier Technology That Teenagers Must Know)

Compiled By Feng Wenyuan

46K0

Ships, commonly known as warships, refer to naval vessels equipped with weapons and equipment that can perform combat missions in the ocean. They are the main equipment of the navy. Ships are mainly used for maritime mobile operations, conducting strategic nuclear raids, protecting one's own or destroying enemy sea lines of communication, conducting blockades or counter-blockades, participating in landing or anti-landing operations, and undertaking support services such as maritime supply, transportation, repair, life-saving, medical care, reconnaissance, investigation, surveying, engineering and testing.

Knowledge of Nuclear Weapons Science and Technology (part 1) (cutting-edge Weapon Science and Technology That Young People Are Highly Concerned About)

Compiled By Feng Wenyuan

57K0

With the rapid development and widespread application of modern high and new technologies, it is triggering military changes worldwide, and cutting-edge weapons are constantly being produced. Cutting-edge weapons refer to new weapons that are fundamentally different from traditional weapons in terms of basic principles, lethality and destructive power, and combat methods. They are new weapons that are under development or exploration.

Knowledge of Stealth Weapon Technology (part 1) (cutting-edge Weapon Technology That Young People Are Highly Concerned About)

Compiled By Feng Wenyuan

58K0

Cutting-edge weapons are a type of high-tech weapons. By learning the scientific knowledge of cutting-edge weapons, we can learn the relevant high-tech knowledge of weapons. This will not only enhance our superb military quality, but also enhance our high-level military scientific knowledge.

Rocket Artillery Technology Knowledge (part 2) (the Most Amazing Ammunition and Artillery Technology for Teenagers)

Compiled By Feng Wenyuan

32K0

Ammunition is generally composed of a warhead, a projection and a stabilizing part. It is the core part of the weapon system and is the ultimate means to launch or drop the weapon into the target area to complete the established combat mission. The caliber of the weapon fired from the barrel is often used to indicate its size. It has the characteristics of large muzzle velocity, high shooting accuracy, and strong economy. It is mainly used to suppress enemy firepower, kill living targets, and destroy fortifications, tanks, and other technical equipment.

Patrol Aircraft Scientific and Technological Knowledge (part 1) (military Aerospace Science and Technology Perspective)

Compiled By Feng Wenyuan

46K0

Military aircraft are the general term for aircraft that directly participate in combat, support combat operations and military training. They are the main technical equipment of the Air Force.

Special Aircraft Science and Technology Knowledge (part 1) (military Aerospace Science and Technology Perspective)

Compiled By Feng Wenyuan

43K0

Military aircraft are the general term for aircraft that directly participate in combat, support combat operations and military training. They are the main technical equipment of the Air Force.

Battleship Technology Knowledge (part 2) (ship and Aircraft Carrier Technology That Teenagers Must Know)

Compiled By Feng Wenyuan

52K0

Ships, commonly known as warships, refer to naval vessels equipped with weapons and equipment that can perform combat missions in the ocean. They are the main equipment of the navy. Ships are mainly used for maritime mobile operations, conducting strategic nuclear raids, protecting one's own or destroying enemy sea lines of communication, conducting blockades or counter-blockades, participating in landing or anti-landing operations, and undertaking support services such as maritime supply, transportation, repair, life-saving, medical care, reconnaissance, investigation, surveying, engineering and testing.

Special Machine Gun Technology Knowledge (part 2) (military Firearms Technology That is an Eye-opener for Teenagers)

Compiled By Feng Wenyuan

39K0

Firearms are the most important individual combat weapons in modern warfare. With the development of information warfare, the types and technologies of firearms are constantly developing and changing. From the birth of the first revolver, to the submachine gun produced to adapt to trench fighting, from the emergence of the first automatic pistol, to the powerful flames emitted by the mini machine gun, etc., Firearms are showing the power of modern technology with increasingly perfect structural designs and increasingly powerful functions. Unveil the mystery of modern firearms and it will be an eye-opener for you!

Military Aviation Science and Technology Knowledge (part 2) (military Aerospace Science and Technology Broad Vision)

Compiled By Feng Wenyuan

43K0

Ships, commonly known as warships, refer to naval vessels equipped with weapons and equipment that can perform combat missions in the ocean. They are the main equipment of the navy. Ships are mainly used for maritime mobile operations, conducting strategic nuclear raids, protecting one's own or destroying enemy sea lines of communication, conducting blockades or counter-blockades, participating in landing or anti-landing operations, and undertaking support services such as maritime supply, transportation, repair, life-saving, medical care, reconnaissance, investigation, surveying, engineering and testing.

Anti-tank Missile Technology Knowledge (part 2) (missile Weapon Technology That Young People Are Highly Concerned About)

Compiled By Feng Wenyuan

41K0

A missile is an unmanned weapon that relies on a guidance system to control its flight trajectory and can designate attack targets and even track the target's movements. Its mission is to detonate the warhead charge near the target and damage the target, or to directly impact the target by relying on its own kinetic energy without a warhead to achieve the damage effect. In other words, the missile is a weapon that relies on its own power unit to propel itself, and is guided by a guidance system to control its flight path and guide it to the target.

Fighter Science and Technology Knowledge (part 2) (military Aerospace Science and Technology Broad View)

Compiled By Feng Wenyuan

41K0

Military aircraft are the general term for aircraft that directly participate in combat, support combat operations and military training. They are the main technical equipment of the Air Force.

Cruiser Technology Knowledge (part 2) (ship and Aircraft Carrier Technology That Teenagers Must Know)

Compiled By Feng Wenyuan

57K0

Ships, commonly known as warships, refer to naval vessels equipped with weapons and equipment that can perform combat missions in the ocean. They are the main equipment of the navy. Ships are mainly used for maritime mobile operations, conducting strategic nuclear raids, protecting one's own or destroying enemy sea lines of communication, conducting blockades or counter-blockades, participating in landing or anti-landing operations, and undertaking support services such as maritime supply, transportation, repair, life-saving, medical care, reconnaissance, investigation, surveying, engineering and testing.

Armored Vehicle Technology Knowledge (part 1) (the Most Shocking Armored Vehicle Technology)

Compiled By Feng Wenyuan

39K0

Military science is a comprehensive science with a wide scope and rich content. It involves many disciplines such as natural science, social science and technical science. Military science focuses on high-tech warfare. Learning modern military high-tech knowledge enables us to understand the frontiers of modern science and technology, understand the situation of weapons development, broaden our horizons, increase knowledge, and cultivate our sense of worry and patriotism, so that we can continue to learn scientific and cultural knowledge to build our strong country and use it as our strong spiritual force.

Special Ship Technology Knowledge (part 1) (ship and Aircraft Carrier Technology That Teenagers Must Know)

Compiled By Feng Wenyuan

48K0

Ships, commonly known as warships, refer to naval vessels equipped with weapons and equipment that can perform combat missions in the ocean. They are the main equipment of the navy. Ships are mainly used for maritime mobile operations, conducting strategic nuclear raids, protecting one's own or destroying enemy sea lines of communication, conducting blockades or counter-blockades, participating in landing or anti-landing operations, and undertaking support services such as maritime supply, transportation, repair, life-saving, medical care, reconnaissance, investigation, surveying, engineering and testing.

1 / 2