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经营范围
发明名称
Fremgangsmåde ved fremstilling af undervisningstavler.
摘要
申请公布号
DK92091(C)
申请公布日期
1961.10.30
申请号
DK19580001289
申请日期
1958.04.09
申请人
DANSK UNDERVISNINGSMATERIEL A/S
发明人
分类号
G09B;(IPC1-7):G09B
主分类号
G09B
代理机构
代理人
主权项
地址
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