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发明名称
Sovitelma painenestekäyttöisessä kallionporauslaitteessa
摘要
申请公布号
FI941731(A0)
申请公布日期
1994.04.14
申请号
FI19940001731
申请日期
1994.04.14
申请人
TAMROCK OY
发明人
NIEMI, JAAKKO
分类号
E21B19/08;E21B44/00;E21B44/06;(IPC1-7):E21C
主分类号
E21B19/08
代理机构
代理人
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