Pumping well shut-off valve,申请号US19650501219-传众专利搜索

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发明名称	Pumping well shut-off valve
摘要
申请公布号	US3325613(A)	申请公布日期	1967.06.13
申请号	US19650501219	申请日期	1965.10.22
申请人	DUNN WILBUR L;JOHNSON PAUL H	发明人	DUNN WILBUR L.;JOHNSON PAUL H.
分类号	E21B34/02	主分类号	E21B34/02
代理机构		代理人
主权项
地址

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