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经营范围
发明名称
Safety joint
摘要
申请公布号
US3381979(A)
申请公布日期
1968.05.07
申请号
US19660527193
申请日期
1966.02.14
申请人
SCHLUMBERGER TECHNOLOGY CORPORATION
发明人
DUDMAN ROY L.
分类号
E21B17/06
主分类号
E21B17/06
代理机构
代理人
主权项
地址
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