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发明名称
摘要
申请公布号	FR2140791(A5)	申请公布日期	1973.01.19
申请号	FR19710020666	申请日期	1971.06.08
申请人	CHARE JEAN	发明人
分类号	E21B4/02;F04C2/107;(IPC1-7):F03C5/00;F03B13/00	主分类号	E21B4/02
代理机构		代理人
主权项
地址

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