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发明名称
MINE ROOF SUPPORTS
摘要
申请公布号
GB2054018(A)
申请公布日期
1981.02.11
申请号
GB19800022045
申请日期
1980.07.04
申请人
CHARBONNAGES DE FRANCE
发明人
分类号
E21D19/04;E21D23/00;E21D23/04;E21D23/08;(IPC1-7):E21D23/04
主分类号
E21D19/04
代理机构
代理人
主权项
地址
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