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发明名称
Vorrichtung zur Feststellung von einzelnen Tagen und Tagesfolgen
摘要
申请公布号
DE901472(C)
申请公布日期
1954.01.11
申请号
DE1951B013255
申请日期
1951.01.06
申请人
SIEGFRIED BUTTNER
发明人
BUTTNER SIEGFRIED
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主分类号
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