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经营范围
发明名称
Improvements in and relating to a logarithmic calculator
摘要
申请公布号
GB582145(A)
申请公布日期
1946.11.06
申请号
GB19440001777
申请日期
1944.01.31
申请人
GERARD FRANCIS WITTGENSTEIN
发明人
分类号
G06G1/04
主分类号
G06G1/04
代理机构
代理人
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