发明名称 Drill bit sharpening apparatus
摘要 An object of the present invention is to provide an apparatus which is suitable for sharpening the drill bits of both the power drill and hand drill. Additionally, the operation of said apparatus is simple, and the sharpening is accurate.
申请公布号 US6116995(A) 申请公布日期 2000.09.12
申请号 US19990307612 申请日期 1999.05.10
申请人 CHAO, YU YI 发明人 CHAO, YU YI
分类号 B24B3/26;(IPC1-7):B24B23/00 主分类号 B24B3/26
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