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发明名称
SIRKULASJONSPUMPE FOR ANVENDELSE I BOREHULL.
摘要
申请公布号
NO871741(D0)
申请公布日期
1987.04.27
申请号
NO19870001741
申请日期
1987.04.27
申请人
CONOCO INC
发明人
PETREE, ALLEN R.
分类号
E21B4/02;E21B4/20;E21B21/00;E21B27/00;E21B27/04;F04C2/107;(IPC1-7):E21B/
主分类号
E21B4/02
代理机构
代理人
主权项
地址
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