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发明名称
Mine roof supports
摘要
申请公布号
GB1056317(A)
申请公布日期
1967.01.25
申请号
GB19640045536
申请日期
1964.11.09
申请人
ELECTRO-HYDRAULICS LIMITED
发明人
LEE ROGER DEMANT;HAROLD ROBERT EDWIN
分类号
E21D17/02;E21D23/06
主分类号
E21D17/02
代理机构
代理人
主权项
地址
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