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发明名称
Zusammensetzbare Lehr- und Demonstrationsmodelle
摘要
申请公布号
DE546182(C)
申请公布日期
1932.03.10
申请号
DE1928H116682D
申请日期
1928.05.24
申请人
CARL WILLIAM HANSEL
发明人
分类号
G09B23/00;G09B23/06
主分类号
G09B23/00
代理机构
代理人
主权项
地址
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