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发明名称
MECHANIZED ROOF SUPPORT FOR LONGWALL INLETS
摘要
申请公布号
PL131726(B1)
申请公布日期
1984.12.31
申请号
PL19810231417
申请日期
1981.05.28
申请人
发明人
分类号
E21D;E21D11/36;E21D23/04;(IPC1-7):E21D11/36
主分类号
E21D
代理机构
代理人
主权项
地址
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