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发明名称
Vorrichtung zur Darstellung von statistischen Vorgängen und Planungsarbeiten
摘要
申请公布号
AT174228(B)
申请公布日期
1953.03.10
申请号
ATD174228
申请日期
1950.05.31
申请人
KAREL PREVRATSKY
发明人
KAREL PREVRATSKY
分类号
主分类号
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代理人
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