LARGE BORE RETRIEVABLE WELL SAFETY VALVE,申请号GB19890019520-传众专利搜索

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发明名称	LARGE BORE RETRIEVABLE WELL SAFETY VALVE
摘要
申请公布号	GB8919520(D0)	申请公布日期	1989.10.11
申请号	GB19890019520	申请日期	1989.08.29
申请人	CAMCO INCORPORATED	发明人
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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