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一种磨削硬脆材料小孔螺纹成型砂轮

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First Author:HANG GAO

Disigner of the Invention:Dongming Guo,杨安强,baoyongjie,曹波,黄均亮

Application Number:CN201210487711.7

Authorization Date:2012-11-26

Authorization number:CN102941382A

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