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发明名称
摘要
申请公布号	FR2062968(A1)	申请公布日期	1971.07.02
申请号	FR19700034411	申请日期	1970.09.23
申请人	BYRON JACKSON INC	发明人
分类号	E21B17/10;(IPC1-7):E21B17/00	主分类号	E21B17/10
代理机构		代理人
主权项
地址

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