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发明名称
PIT VENTILATION METHOD
摘要
申请公布号
SU859648(A1)
申请公布日期
1981.08.30
申请号
SU19762402125
申请日期
1976.09.01
申请人
INST GORNOGO DELA MINISTERSTV
发明人
KONOREV MIKHAIL M,SU;FILATOV SERGEJ S,SU;NESTERENKO GENNADIJ F,SU;MAKAROV VALERIJ N,SU
分类号
E21F1/00;(IPC1-7):E21F1/00
主分类号
E21F1/00
代理机构
代理人
主权项
地址
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