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省力螺丝刀 / Effort screwdriver

省力螺丝刀

Which screwdriver design uses a lever principle, when a screwdriver to remove something more demanding, you can pull the handle on both sides, effort and convenient

University

Hebei University of Technology of China

Hebei University of Technology of China
Tianjin, China

University

Hebei University of Technology of China

Hebei University of Technology of China
Tianjin, China

University

Hebei University of Technology of China

Hebei University of Technology of China
Tianjin, China

Design

Hebei University of Technology of China

Hebei University of Technology of China
Tianjin, China