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发明名称
Ratio computer
摘要
申请公布号
US2860241(A)
申请公布日期
1958.11.11
申请号
US19540465758
申请日期
1954.10.29
申请人
POST RICHARD F
发明人
POST RICHARD F.
分类号
G06G7/163
主分类号
G06G7/163
代理机构
代理人
主权项
地址
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