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发明名称
MINING ROOF SUPPORT COLUMN
摘要
申请公布号
SU691571(A1)
申请公布日期
1979.10.15
申请号
SU19782603956
申请日期
1978.04.12
申请人
RAKHMANOV NIKOLAJ N,SU
发明人
RAKHMANOV NIKOLAJ N,SU
分类号
E21D15/44;(IPC1-7):E21D15/44
主分类号
E21D15/44
代理机构
代理人
主权项
地址
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