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发明名称
APPARATUS FOR SUPPORTING MINE ROOFS
摘要
申请公布号
GB1582305(A)
申请公布日期
1981.01.07
申请号
GB19770017541
申请日期
1977.04.27
申请人
OROSZLANYI SZENBANYAK
发明人
分类号
E21D23/00;E21D23/04;E21D23/08;(IPC1-7):E21D15/00
主分类号
E21D23/00
代理机构
代理人
主权项
地址
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