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发明名称
Improvements in or relating to calculating machines
摘要
申请公布号
GB699914(A)
申请公布日期
1953.11.18
申请号
GB19510000457
申请日期
1951.01.05
申请人
BELL PUNCH COMPANY LIMITED
发明人
WEBB CHRISTOPHER FREDERICK
分类号
G06C7/06
主分类号
G06C7/06
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