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发明名称
Untertage-Abbauverfahren
摘要
申请公布号
DE551506(C)
申请公布日期
1932.06.01
申请号
DED551506D
申请日期
申请人
LUEBECKER MASCHINENBAU-GESELLSCHAFT
发明人
分类号
E21C41/00;E21C41/18
主分类号
E21C41/00
代理机构
代理人
主权项
地址
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