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发明名称
Verfahren zum Ausfuellen von Hohlraeumen in Untertagebetrieben vermittels Schrappers
摘要
申请公布号
DE527213(C)
申请公布日期
1931.06.15
申请号
DENDATD052097D
申请日期
申请人
DEMAG AKT.-GES.
发明人
分类号
E21F15/06
主分类号
E21F15/06
代理机构
代理人
主权项
地址
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