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发明名称
Zusammenlegbares Joch zur Sicherung gegen Berge- und Kohlenfall beim Streckenvortrieb
摘要
申请公布号
DE513356(C)
申请公布日期
1930.11.26
申请号
DENDATM113213D
申请日期
申请人
MITTELDEUTSCHE STAHLWERKE AKT.-GES.
发明人
分类号
E21D11/34
主分类号
E21D11/34
代理机构
代理人
主权项
地址
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