Flexible mandrel for use in cold bending pipe,申请号US19560566866-传众专利搜索

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发明名称	Flexible mandrel for use in cold bending pipe
摘要
申请公布号	US2984284(A)	申请公布日期	1961.05.16
申请号	US19560566866	申请日期	1956.02.21
申请人	BALLARD SAM L	发明人	BALLARD SAM L.
分类号	B21D9/01	主分类号	B21D9/01
代理机构		代理人
主权项
地址

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