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发明名称
Valve assembly
摘要
申请公布号
GB2388139(B)
申请公布日期
2003.12.17
申请号
GB20030018841
申请日期
2000.05.19
申请人
* QUARTECH ENGINEERING LIMITED
发明人
CLIVE JOHN * FRENCH
分类号
E21B21/00;E21B34/00;E21B34/06;E21B34/10;(IPC1-7):E21B43/12
主分类号
E21B21/00
代理机构
代理人
主权项
地址
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