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发明名称
Fahrbare Mauerlehre fuer oben offene Kanaele
摘要
申请公布号
DE507456(C)
申请公布日期
1930.09.29
申请号
DENDATB143077D
申请日期
申请人
FRIEDRICH BUSCH
发明人
分类号
E04G21/18
主分类号
E04G21/18
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