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经营范围
发明名称
Restraint mechanism
摘要
申请公布号
GB0012769(D0)
申请公布日期
2000.07.19
申请号
GB20000012769
申请日期
2000.05.26
申请人
WEATHERFORD/LAMB INC
发明人
分类号
E21B23/01;E21B23/04;E21B40/00
主分类号
E21B23/01
代理机构
代理人
主权项
地址
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