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发明名称
VORRICHTUNG ZUR FERNUEBERTRAGUNG VON INFORMATIONEN AUS EINEM BOHRLOCH ZUR ERDOBERFLAECHE WAEHREND DES BETRIEBS EINES BOHRGERAETES
摘要
申请公布号
DE3035905(A1)
申请公布日期
1982.07.22
申请号
DE19803035905
申请日期
1980.09.24
申请人
CHRISTENSEN,INC.
发明人
JUERGENS,RAINER,DR.-ING.
分类号
E21B4/02;E21B47/00;E21B47/18;(IPC1-7):E21B47/12
主分类号
E21B4/02
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