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发明名称
摘要
申请公布号	FR2197109(A1)	申请公布日期	1974.03.22
申请号	FR19730030477	申请日期	1973.08.22
申请人	TIGRE TIERRA INC,US	发明人
分类号	E21B4/06;E21B4/14;E21B25/02;(IPC1-7):E21B25/00;E02D1/04;E21B5/00;E21B23/00;E21C19/00	主分类号	E21B4/06
代理机构		代理人
主权项
地址

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