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发明名称
Tafel zur Veranschaulichung von Rechenvorgängen
摘要
申请公布号
AT213106(B)
申请公布日期
1961.01.25
申请号
AT19570005899
申请日期
1957.09.10
申请人
ERWIN STOEHRER;PAUL SCHULTZ
发明人
ERWIN STOEHRER;PAUL SCHULTZ
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主分类号
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