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发明名称
Kaufmännische Rechenscheibe
摘要
申请公布号
AT205777(B)
申请公布日期
1959.10.10
申请号
AT19580001496
申请日期
1958.03.01
申请人
JOSEF PROBST
发明人
JOSEF PROBST
分类号
主分类号
代理机构
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