EXTERNALLY ADJUSTED SPRING ACTUATED WELL VALVE,申请号GB19790042132-传众专利搜索

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发明名称	EXTERNALLY ADJUSTED SPRING ACTUATED WELL VALVE
摘要
申请公布号	GB2047771(A)	申请公布日期	1980.12.03
申请号	GB19790042132	申请日期	1979.12.06
申请人	CAMCO INC	发明人
分类号	E21B34/00;E21B34/10;E21B43/12;(IPC1-7):E21B34/10	主分类号	E21B34/00
代理机构		代理人
主权项
地址

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