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一种阶梯微齿双刃带钻锪一体钻头

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First Author:Fuji Wang

Disigner of the Invention:Rao Fu,jiazhenyuan,陈磊,成德,李汝鹏,葛恩德,王贤峰

Affilication of Author(s):机械工程学院

Application Number:ZL 201611182140.0

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