Method of making split piston rings,申请号US19450635004-传众专利搜索

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发明名称	Method of making split piston rings
摘要
申请公布号	US2453330(A)	申请公布日期	1948.11.09
申请号	US19450635004	申请日期	1945.12.14
申请人	MARSHALL LEWIS C	发明人	MARSHALL LEWIS C.
分类号	C21D9/40	主分类号	C21D9/40
代理机构		代理人
主权项
地址

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