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Double Head Screwdriver / Screwdriver

Double Head Screwdriver

At opposite ends of the screwdriver,it is a straight screwdriver and a cross screwdriver respectively , users in case of two kinds of screw case does not need to be replaced with a screwdriver only needto slide the slide button to the other side .

University

University of South China

University of South China
Hengyang, China

Zhong Haiyan,
University of South China

Zhu Weiji,
University of South China

Su Ping,
University of South China

Zhou Jun,
University of South China

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