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经营范围
发明名称
METHRD OF SUPPORTING THE ROOF OF MINE WORKINGS
摘要
申请公布号
SU909189(A1)
申请公布日期
1982.02.28
申请号
SU19802939587
申请日期
1980.06.09
申请人
NII STROITELSTVA UGOLNYKH GORNORUDNYKH PREDPRIYATIJ
发明人
LAZAREVICH NIKOLAJ D,SU;BURKOV YURIJ V,SU;DUDA EVGENIJ G,SU
分类号
E21D11/00;(IPC1-7):E21D11/00
主分类号
E21D11/00
代理机构
代理人
主权项
地址
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