TUBING PRESSURE BALANCED WELL SAFETY VALVE,申请号GB19850005480-传众专利搜索

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发明名称	TUBING PRESSURE BALANCED WELL SAFETY VALVE
摘要
申请公布号	GB2155976(A)	申请公布日期	1985.10.02
申请号	GB19850005480	申请日期	1985.03.04
申请人	* CAMCO INCORPORATED	发明人	RONALD EARL * PRINGLE
分类号	E21B34/00;E21B34/10;(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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