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发明名称
METHOD FOR VENTILATION OF MINE WORKINGS SYSTEM
摘要
申请公布号
RU1802151(C)
申请公布日期
1993.03.15
申请号
SU19904877625
申请日期
1990.08.31
申请人
VOSTOCHNYJ NI GORNORUDNYJ INSTITUT
发明人
ZELENETSKIJ VASILIJ A,SU
分类号
E21F1/00
主分类号
E21F1/00
代理机构
代理人
主权项
地址
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