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经营范围
发明名称
WELL CONTROL APPARATUS
摘要
申请公布号
GB1505194(A)
申请公布日期
1978.03.30
申请号
GB19750015557
申请日期
1975.04.16
申请人
LYNES INC
发明人
分类号
E21B21/10;E21B33/127;E21B34/14;(IPC1-7):E21B33/12
主分类号
E21B21/10
代理机构
代理人
主权项
地址
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