Process of making piston rings,申请号US19310534165-传众专利搜索

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发明名称	Process of making piston rings
摘要
申请公布号	US1856240(A)	申请公布日期	1932.05.03
申请号	US19310534165	申请日期	1931.05.01
申请人	THE TIMKEN ROLLER BEARING COMPANY	发明人	BUCKWALTER TRACY V.
分类号	B23P15/06	主分类号	B23P15/06
代理机构		代理人
主权项
地址

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