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发明名称
MUFFE FUER STUFENZEMENTATION VON BOHRLOECHERN
摘要
申请公布号
DD263564(A1)
申请公布日期
1989.01.04
申请号
DD19870306209
申请日期
1987.08.20
申请人
VEB ERDOEL-ERDGAS GOMMERN -STAMMBETRIEB,DD
发明人
HAMMER,GERD,DD;GEISLER,HANS-JUERGEN,DD;GOERISCH,KLAUS,DD;VANIFATJEW,VLADIMIR I.,SU;DUDALATOV,ANATOLI K.,SU;KASAROV,GENADI K.,SU;SCHMIRGAL,RAINER,DD
分类号
E21B33/14;(IPC1-7):E21B33/14
主分类号
E21B33/14
代理机构
代理人
主权项
地址
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