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发明名称
Appareil à charges creuses pour perforer les puits de pétrole
摘要
申请公布号
FR1469672(A)
申请公布日期
1967.02.17
申请号
FR19660049220
申请日期
1966.02.11
申请人
SCHLUMBERGER WELL SURVEYING CORPORATION
发明人
分类号
E21B43/117
主分类号
E21B43/117
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