Apparatus having spring urged die forging members for making extruded hollow articles of external polygonal form,申请号US19560569127-传众专利搜索

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发明名称	Apparatus having spring urged die forging members for making extruded hollow articles of external polygonal form
摘要
申请公布号	US2903721(A)	申请公布日期	1959.09.15
申请号	US19560569127	申请日期	1956.03.02
申请人	BRAUN FREDERICK W;ALFRED BRAUN	发明人	BRAUN FREDERICK W.;BRAUN ALFRED
分类号	B21C33/00	主分类号	B21C33/00
代理机构		代理人
主权项
地址

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