Well packer valve arrangement,申请号US19840622958-传众专利搜索

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发明名称	Well packer valve arrangement
摘要
申请公布号	USRE32438(E)	申请公布日期	1987.06.16
申请号	US19840622958	申请日期	1984.06.21
申请人		发明人
分类号	E21B33/127	主分类号	E21B33/127
代理机构		代理人
主权项
地址

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