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一种阶梯微齿双刃带钻锪一体钻头

Release Time:2020-02-19  Hits:

First Author: Fuji Wang

Disigner of the Invention: 王贤峰,葛恩德,李汝鹏,成德,陈磊,贾振元,付饶

Application Number: CN201611182140.0

Authorization Date: 2016-12-20

Authorization Number: CN106624080A

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