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发明名称
APPARECCHIO PER IL MANEGGIO DI ELEMENTI DI COLONNE DI TRIVELLAZIONE
摘要
申请公布号
IT1026050(B)
申请公布日期
1978.09.20
申请号
IT19740054606
申请日期
1974.12.17
申请人
ATLAS COPCO AKTIEBOLAG
发明人
分类号
E21B19/14;E21B19/16;E21B19/20;(IPC1-7):E21B/
主分类号
E21B19/14
代理机构
代理人
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