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发明名称
FREMGANGSMAATE FOR BESTEMMELSE AV KATIONEBYTTER-EVNER I GRUNNFORMASJONER SOM GJENNOMTRENGES AV ET BOREHULL
摘要
申请公布号
NO800479(A)
申请公布日期
1980.08.27
申请号
NO19800000479
申请日期
1980.02.21
申请人
DRESSER INDUSTRIES, INC.,
发明人
FERTL, WALTER HANS,;WELKER, DAVID WILLIAM,
分类号
E21B49/00;G01V5/06;(IPC1-7):G01V/
主分类号
E21B49/00
代理机构
代理人
主权项
地址
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