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经营范围
发明名称
LEHRGERAET
摘要
申请公布号
DE1958001(B2)
申请公布日期
1977.01.27
申请号
DE19691958001
申请日期
1969.11.18
申请人
发明人
分类号
G09B7/08;(IPC1-7):G09B7/00
主分类号
G09B7/08
代理机构
代理人
主权项
地址
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