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发明名称
Ventilzusammenbau im Bohrlochkopf
摘要
申请公布号
DE69316875(D1)
申请公布日期
1998.03.12
申请号
DE19936016875
申请日期
1993.05.11
申请人
COOPER CAMERON CORP., HOUSTON, TEX., US
发明人
CRAVEN, JOHN, LEEDS, YORKSHIRE LS8 2QG, GB
分类号
E21B34/02;F16K3/02;F16K31/122;(IPC1-7):E21B34/02
主分类号
E21B34/02
代理机构
代理人
主权项
地址
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