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发明名称
Improvements in or relating to calculating mechanism
摘要
申请公布号
GB578914(A)
申请公布日期
1946.07.17
申请号
GB19410016688
申请日期
1941.12.26
申请人
JEFFERY WALTON BARNES;WILLIAM HENDERSON COULTHARD
发明人
分类号
G06G3/00
主分类号
G06G3/00
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代理人
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