,申请号FR19750026622-传众专利搜索

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发明名称
摘要
申请公布号	FR2283304(B1)	申请公布日期	1982.04.30
申请号	FR19750026622	申请日期	1975.08.29
申请人	KENNAMETAL INC	发明人
分类号	E21B10/32;E21D20/02;(IPC1-7):E21C23/00;E02F5/16;E21C13/10	主分类号	E21B10/32
代理机构		代理人
主权项
地址

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