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发明名称
Roof support assemblies suitable for use in mines
摘要
申请公布号
GB1042396(A)
申请公布日期
1966.09.14
申请号
GB19640023454
申请日期
1964.06.05
申请人
DOWTY MINING EQUIPMENT LIMITED
发明人
HOLLIS RICHARD JOHN
分类号
E21D23/00
主分类号
E21D23/00
代理机构
代理人
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地址
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