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经营范围
发明名称
MINE ROOF SUPPORT CONTROL
摘要
申请公布号
GB1593832(A)
申请公布日期
1981.07.22
申请号
GB19780001730
申请日期
1978.01.17
申请人
GULLICK DOBSON LTD
发明人
分类号
E21D23/16;E21D23/26;(IPC1-7):E21D23/16
主分类号
E21D23/16
代理机构
代理人
主权项
地址
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