Vacuum valve grinding tool,申请号US19290371176-传众专利搜索

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发明名称	Vacuum valve grinding tool
摘要
申请公布号	US1817688(A)	申请公布日期	1931.08.04
申请号	US19290371176	申请日期	1929.06.15
申请人	HICKS DONALD E	发明人	HICKS DONALD E.
分类号	B24B15/08	主分类号	B24B15/08
代理机构		代理人
主权项
地址

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