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发明名称
MINE ROOF SUPPORT ASSEMBLIES
摘要
申请公布号
GB1273539(A)
申请公布日期
1972.05.10
申请号
GB19680027001
申请日期
1968.06.06
申请人
GRAHAM CLENTON RAWLINS
发明人
GRAHAM CLENTON RAWLINS
分类号
E21D15/58
主分类号
E21D15/58
代理机构
代理人
主权项
地址
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