Method of manufacturing hollow piston cores,申请号US19570704157-传众专利搜索

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发明名称	Method of manufacturing hollow piston cores
摘要
申请公布号	US2991521(A)	申请公布日期	1961.07.11
申请号	US19570704157	申请日期	1957.12.20
申请人	GENERAL MOTORS CORPORATION	发明人	BRYANT ALWIN L.;MILLS DONALD S.
分类号	B22C9/10;B22C23/00	主分类号	B22C9/10
代理机构		代理人
主权项
地址

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