APPARATUS AND METHOD FOR AUTOMATICALLY CONTROLLING FLUID PRESSURE IN A WELL BORE,申请号CAD849390-传众专利搜索

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发明名称	APPARATUS AND METHOD FOR AUTOMATICALLY CONTROLLING FLUID PRESSURE IN A WELL BORE
摘要
申请公布号	CA849390(A)	申请公布日期	1970.08.18
申请号	CAD849390	申请日期
申请人	WARREN AUTOMATIC TOOL COMPANY	发明人	ETHELL J. DOWER
分类号		主分类号
代理机构		代理人
主权项
地址

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