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经营范围
发明名称
Improvements relating to supports for mine workings
摘要
申请公布号
GB958056(A)
申请公布日期
1964.05.13
申请号
GB19610028859
申请日期
1961.08.10
申请人
BECORIT (G.B.) LIMITED
发明人
分类号
E21D11/18
主分类号
E21D11/18
代理机构
代理人
主权项
地址
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