RETRIEVABLE WELL SAFETY VALVE,申请号GB19860030141-传众专利搜索

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发明名称	RETRIEVABLE WELL SAFETY VALVE
摘要
申请公布号	GB8630141(D0)	申请公布日期	1987.01.28
申请号	GB19860030141	申请日期	1986.12.17
申请人	CAMCO INC	发明人
分类号	E21B34/10	主分类号	E21B34/10
代理机构		代理人
主权项
地址

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