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发明名称
Calculating device
摘要
申请公布号
US2307534(A)
申请公布日期
1943.01.05
申请号
US19400336686
申请日期
1940.05.23
申请人
BETHLEHEM STEEL COMPANY
发明人
OLSON ALBERT A.
分类号
G06G1/14
主分类号
G06G1/14
代理机构
代理人
主权项
地址
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