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发明名称
METHOD OF WINNING THICK COAL SEAMS AT HYDRAULIC EXCAVATION
摘要
申请公布号
SU621877(A1)
申请公布日期
1978.08.30
申请号
SU19772456400
申请日期
1977.03.01
申请人
VNI PK I DOBYCHI UGLYA GIDRAVLICHESKIM SPOSOBOM
发明人
PAKHTUSOV YURIJ GAVRILOVICH,SU;FOMICHEV SERGEJ GRIGOREVICH,SU;PAKHTUSOV GAVRIIL ALEKSANDROVICH,SU
分类号
(IPC1-7):E21C41/04
主分类号
(IPC1-7):E21C41/04
代理机构
代理人
主权项
地址
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