Screwdriver

The invention discloses a screwdriver. The screwdriver comprises a handle, a spiral groove and a screwdriver bar, wherein the spiral groove is formed in the handle and coaxial with the handle, the screwdriver bar is arranged in the spiral groove, and the rotating direction of the spiral groove is th...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	CHI YAHAI, ZHOU CHAO, DU JIAZHI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	HAND TOOLS MANIPULATORS PERFORMING OPERATIONS PORTABLE POWER-DRIVEN TOOLS TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FORFASTENING, CONNECTING, DISENGAGING OR HOLDING TRANSPORTING
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