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经营范围
发明名称
SUBSEA WELLHEAD EQUIPMENT
摘要
申请公布号
GB8826351(D0)
申请公布日期
1988.12.14
申请号
GB19880026351
申请日期
1988.11.10
申请人
DRIL-QUIP INC
发明人
分类号
E21B33/038;(IPC1-7):E21B/
主分类号
E21B33/038
代理机构
代理人
主权项
地址
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