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发明名称
Improvements in or relating to plug boards for electric statistical machines
摘要
申请公布号
GB617539(A)
申请公布日期
1949.02.08
申请号
GB19460029738
申请日期
1946.10.05
申请人
HERBERT PAIN
发明人
分类号
主分类号
代理机构
代理人
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地址
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