,申请号FR19760005250-传众专利搜索

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发明名称
摘要
申请公布号	FR2302408(B1)	申请公布日期	1982.11.05
申请号	FR19760005250	申请日期	1976.02.25
申请人	DRESSER INDUSTRIES INC	发明人
分类号	E21B10/18;E21B10/22;E21B10/24;E21B10/25;F16C21/00;F16J15/32;(IPC1-7):21B9/08	主分类号	E21B10/18
代理机构		代理人
主权项
地址

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