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发明名称
DEVICE FOR WINNING MINERALS THROUGH BOREHOLES
摘要
申请公布号
SU617584(A1)
申请公布日期
1978.07.30
申请号
SU19762418036
申请日期
1976.11.05
申请人
SHPAK DMITRIJ N,SU
发明人
SHPAK DMITRIJ N,SU
分类号
E21B43/28;E21C45/00;(IPC1-7):E21B43/28
主分类号
E21B43/28
代理机构
代理人
主权项
地址
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