Expansible driving core for driving pile shells,申请号US19570646740-传众专利搜索

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发明名称	Expansible driving core for driving pile shells
摘要
申请公布号	US2840993(A)	申请公布日期	1958.07.01
申请号	US19570646740	申请日期	1957.03.18
申请人	CAUDILL HOWARD F	发明人	CAUDILL HOWARD F.
分类号	E02D7/30	主分类号	E02D7/30
代理机构		代理人
主权项
地址

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