Valve grinding machine,申请号US19310539221-传众专利搜索

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发明名称	Valve grinding machine
摘要
申请公布号	US1941918(A)	申请公布日期	1934.01.02
申请号	US19310539221	申请日期	1931.05.22
申请人	THE HALL MANUFACTURING COMPANY	发明人	SCHWAKOPF EMIL F.
分类号	B24B15/00	主分类号	B24B15/00
代理机构		代理人
主权项
地址

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