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发明名称
Gerade oder gebogene, federnde und zwischen den Ausbaurahmen lueftbare Stahlverzugsstreifen fuer den Grubenausbau
摘要
申请公布号
DE536183(C)
申请公布日期
1931.10.21
申请号
DED536183D
申请日期
申请人
ARNOLD KOEPE;OTTO LEHMANN
发明人
分类号
E21D11/15
主分类号
E21D11/15
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代理人
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