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发明名称
Roof supports for mines
摘要
申请公布号
US3186178(A)
申请公布日期
1965.06.01
申请号
US19610127979
申请日期
1961.07.31
申请人
GULLICK LIMITED
发明人
ALLEN ARCHELAIUS D.
分类号
E21D23/00;E21F13/08
主分类号
E21D23/00
代理机构
代理人
主权项
地址
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