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发明名称
Improvements in or relating to mine roof supports
摘要
申请公布号
GB2093515(A)
申请公布日期
1982.09.02
申请号
GB19810034835
申请日期
1981.11.19
申请人
DOBSON PARK INDUSTRIES LTD
发明人
分类号
E21D23/00;E21D23/04;E21D23/08;(IPC1-7):E21D23/04
主分类号
E21D23/00
代理机构
代理人
主权项
地址
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