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发明名称
MINE ROOF SUPPORT SYSTEM
摘要
申请公布号
GB1286814(A)
申请公布日期
1972.08.23
申请号
GB19680055307
申请日期
1968.11.21
申请人
DOWTY TECHNICAL DEVELOPMENTS LIMITED
发明人
ROGER GILES DAUBENEY
分类号
E21D23/00;G05B19/44
主分类号
E21D23/00
代理机构
代理人
主权项
地址
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