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发明名称
ALS LEHRMITTEL ZU VERWENDENDE RECHENTAFEL.
摘要
申请公布号
DE1618183(U)
申请公布日期
1950.12.28
申请号
DE194900M0090U
申请日期
1949.10.18
申请人
MAX MUELLER
发明人
MAX MUELLER
分类号
主分类号
代理机构
代理人
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