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发明名称
FREMGANGSMAADE TIL BESTEMMELSE AF AZIMUTH AF ET BOREHUL
摘要
申请公布号
DK83986(D0)
申请公布日期
1986.02.24
申请号
DK19860000839
申请日期
1986.02.24
申请人
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.
发明人
DONGEN JOHANNES CORNELIS MARIA VAN;MAEKIAHO LEO BERNHARD
分类号
E21B47/022;(IPC1-7):E21B/
主分类号
E21B47/022
代理机构
代理人
主权项
地址
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