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发明名称
Zentriervorrichtung fuer die Verrohrung von Erdoelsonden
摘要
申请公布号
DE1139452(B)
申请公布日期
1962.11.15
申请号
DE1960W027547
申请日期
1960.03.29
申请人
WEATHERFORD OIL TOOL CO., INC.
发明人
REMP THOMAS E.
分类号
E21B17/10
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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