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一种具有回勾刃的手工钻头

Release Time:2020-04-14  Hits:

First Author: 贾振元

Disigner of the Invention: 樊俊峰,闫建博,谷天雨,郑嘉全,成德,Fuji Wang,郝佳轩

Authorization Number: ZL 201811199427.3

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