,申请号FRD1575228-传众专利搜索

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发明名称
摘要
申请公布号	FR1575228(A)	申请公布日期	1969.07.18
申请号	FRD1575228	申请日期	1968.07.30
申请人		发明人
分类号	E21B7/00;E21B10/00;E21C25/58;E21C35/08;E21D9/10	主分类号	E21B7/00
代理机构		代理人
主权项
地址

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