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发明名称
MINE ROOF SUPPORTS
摘要
申请公布号
GB8328281(D0)
申请公布日期
1983.11.23
申请号
GB19830028281
申请日期
1983.10.22
申请人
DOBSON PARK INDUSTRIES PLC
发明人
分类号
E21D23/08;(IPC1-7):E21D23/08
主分类号
E21D23/08
代理机构
代理人
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地址
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