Expanding mandrel,申请号US19490127223-传众专利搜索

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发明名称	Expanding mandrel
摘要
申请公布号	US2601419(A)	申请公布日期	1952.06.24
申请号	US19490127223	申请日期	1949.11.14
申请人	SPAHN HILBERT C	发明人	SPAHN HILBERT C.
分类号	B23B31/40	主分类号	B23B31/40
代理机构		代理人
主权项
地址

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