Recommend Books on Skills
I would like to read a book similar to "Word, Excel, and PPT Office Applications from Beginner to Master". I want to learn some skills to make money, but my wallet is a bit tight. I hope you can recommend some free skills learning materials. They are good for everything, including handicrafts and making.
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When I saw this book, I remembered my friend who worked in the subway. He told me that their work requirements are very strict and there is no room for sloppiness. This book should help him to better understand the inspection and maintenance of the catenary. And I especially hate those who destroy public facilities. I hope this book can make more people pay attention to it and take care of our urban rail transit together.