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发明名称
MASCHINE ZUR HANDHABUNG VON BOHRLOCHGESTAENGEN.
摘要
申请公布号
DE199664(T1)
申请公布日期
1987.04.09
申请号
DE19860630040T
申请日期
1986.03.06
申请人
VARCO INTERNATIONAL INC., ORANGE, CALIF., US
发明人
BOYADJIEFF, GEORGE I., ANAHEIM CALIFORNIA 92807, US
分类号
E21B19/02;E21B19/14;E21B19/20;(IPC1-7):E21B19/14
主分类号
E21B19/02
代理机构
代理人
主权项
地址
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