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发明名称
Lehrmodell von elektrischen Maschinen
摘要
申请公布号
DE589989(C)
申请公布日期
1933.12.22
申请号
DE1932P065995D
申请日期
1932.09.13
申请人
GUSTAV PETER
发明人
分类号
G09B23/18
主分类号
G09B23/18
代理机构
代理人
主权项
地址
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