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发明名称
LEHRMITTEL FUER DEN MATHEMATIKUNTERRICHT.
摘要
申请公布号
DE1834254(U)
申请公布日期
1961.07.06
申请号
DE196100M7941U
申请日期
1961.04.29
申请人
GEORG MOELLER
发明人
GEORG MOELLER
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主分类号
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