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发明名称
Металлическое перекрытие для ограждения рабочего пространства очистного забоя от обрушающихся боковых пород
摘要
申请公布号
SU92852(A1)
申请公布日期
1950.11.30
申请号
SU19490393596
申请日期
1949.03.17
申请人
MISIK M.F.
发明人
MISIK M.F.
分类号
E21C41/18
主分类号
E21C41/18
代理机构
代理人
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地址
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