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发明名称
Improvements in letter files and card indices
摘要
申请公布号
GB360537(A)
申请公布日期
1931.11.12
申请号
GB19300025632
申请日期
1930.08.27
申请人
RAYMOND SOUTHEY;THEODORE ALFRED SOUTHEY
发明人
分类号
B42F17/08
主分类号
B42F17/08
代理机构
代理人
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