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发明名称
Betonformsteinausbau fuer Grubenstrecken
摘要
申请公布号
DE927981(C)
申请公布日期
1955.05.23
申请号
DE1951SC06246
申请日期
1951.04.04
申请人
SCHMIDTMANN EMIL
发明人
SCHMIDTMANN EMIL
分类号
E21D11/05
主分类号
E21D11/05
代理机构
代理人
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