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发明名称
Mine roof support
摘要
申请公布号
GB2220022(A)
申请公布日期
1989.12.28
申请号
GB19880015085
申请日期
1988.06.24
申请人
* DOWTY HUCKNALL LIMITED
发明人
PETER JOHN * GREEN;RICHARD ARTHUR * NAYLOR
分类号
E21D23/06
主分类号
E21D23/06
代理机构
代理人
主权项
地址
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