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发明名称
Tangentsæt til regnemaskiner.
摘要
申请公布号
DK67614(C)
申请公布日期
1948.09.13
申请号
DK19440002970
申请日期
1944.10.31
申请人
JOHN CARLSEN
发明人
JOHN CARLSEN
分类号
主分类号
代理机构
代理人
主权项
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