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经营范围
发明名称
Improvements in or relating to calculating slide rules
摘要
申请公布号
GB510108(A)
申请公布日期
1939.07.27
申请号
GB19380018014
申请日期
1938.01.28
申请人
CHARLES ANDREW FOUNTAINE
发明人
分类号
G06G1/06
主分类号
G06G1/06
代理机构
代理人
主权项
地址
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