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发明名称
Roof-supporting device such as pit props
摘要
申请公布号
GB965455(A)
申请公布日期
1964.07.29
申请号
GB19610017050
申请日期
1961.05.10
申请人
DOWTY MINING EQUIPMENT LIMITED
发明人
FARR PETER
分类号
E21D15/51
主分类号
E21D15/51
代理机构
代理人
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地址
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