WELL TESTING VALVE,申请号AU19800062017-传众专利搜索

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发明名称	WELL TESTING VALVE
摘要
申请公布号	AU538817(B2)	申请公布日期	1984.08.30
申请号	AU19800062017	申请日期	1980.09.03
申请人	OTIS ENGINEERING CORP.	发明人	JOHN VICTOR FREDD
分类号	E21B34/14;E21B49/08;(IPC1-7):E21B34/14;F16K31/44	主分类号	E21B34/14
代理机构		代理人
主权项
地址

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