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发明名称
VERFAHREN UND VORRICHTUNG ZUM VARIIEREN DER DICHTE VONBOHRFLÜSSIGKEITEN IN TIEFWASSER- ÍLBOHRANWENDUNGEN
摘要
申请公布号
AT442512(T)
申请公布日期
2009.09.15
申请号
AT20030811248T
申请日期
2003.11.03
申请人
DE BOER, LUC
发明人
DE BOER, LUC
分类号
E21B21/00;E21B;E21B1/00;E21B7/128;E21B21/06;E21B21/08;E21B21/10;E21B21/14;E21B33/035;E21B33/076
主分类号
E21B21/00
代理机构
代理人
主权项
地址
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