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发明名称
Improvements in or relating to walling for use in mine-workings
摘要
申请公布号
GB860195(A)
申请公布日期
1961.02.01
申请号
GB19570011123
申请日期
1957.04.05
申请人
BOCHUMER GESELLSCHAFT FUR GRUBENAUSBAU UND TECHNIK M.B.H.
发明人
分类号
E21D11/20
主分类号
E21D11/20
代理机构
代理人
主权项
地址
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