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发明名称
VALVE
摘要
申请公布号
GB2244301(B)
申请公布日期
1993.05.26
申请号
GB19910010632
申请日期
1991.05.16
申请人
* OTIS ENGINEERING CORPORATION
发明人
RENNIE L. * DICKSON;CRAIG W. * GODFREY;KENNETH L * SCHWENDEMANN;TIMOTHY J * NOACK
分类号
E21B29/08;E21B34/00;E21B34/10
主分类号
E21B29/08
代理机构
代理人
主权项
地址
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