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Usually, when we assemble or disassemble something, they usually have to prepare several different models of the screwdriver. Thus, I designed a scalable multi-type screwdriver. If, in using a small Phillips screws, small Phillips screw driver to put the head of medium and large top up. This is not the same thing for the assembly or disassembly prepared for a lot of different types of screwdriver.
Jiangxi University of Finance and Economics
NanChang City,Jiangxi Province, China
Jiangxi University of Finance and Economics
NanChang City,Jiangxi Province, China
Hongxing Xiang
Min Zhou
Wanli Hou
Zhengzhou Li