Contractable ram mandrels,申请号US19560585778-传众专利搜索

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发明名称	Contractable ram mandrels
摘要
申请公布号	US2943729(A)	申请公布日期	1960.07.05
申请号	US19560585778	申请日期	1956.05.18
申请人	BOEING AIRPLANE COMPANY	发明人	DALRYMPLE GEORGE H.
分类号	B21C3/16	主分类号	B21C3/16
代理机构		代理人
主权项
地址

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