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发明名称
DEMONSTRATIONSMITTEL FUER DEN ELEMENTARUNTERRICHT.
摘要
申请公布号
DE1896763(U)
申请公布日期
1964.07.16
申请号
DE196300G8155U
申请日期
1963.06.27
申请人
AUGUST GAEDKE
发明人
AUGUST GAEDKE
分类号
主分类号
代理机构
代理人
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