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发明名称
Mine roof support forepoling beam
摘要
申请公布号
GB2126639(A)
申请公布日期
1984.03.28
申请号
GB19830011696
申请日期
1983.04.28
申请人
* DRESSER EUROPE SA
发明人
GEORGE ALBERT * PARROTT
分类号
E21D23/06;(IPC1-7):E21D23/00
主分类号
E21D23/06
代理机构
代理人
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地址
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