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发明名称
Valves
摘要
申请公布号
GB2205925(A)
申请公布日期
1988.12.21
申请号
GB19870014332
申请日期
1987.06.18
申请人
* CAMERON WORKS LIMITED
发明人
BRUCE * JAGGER
分类号
E21B29/08;E21B34/02;F16K31/122;(IPC1-7):F16K31/00
主分类号
E21B29/08
代理机构
代理人
主权项
地址
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