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发明名称
Improvements in or relating to card filing systems
摘要
申请公布号
GB764769(A)
申请公布日期
1957.01.02
申请号
GB19540028972
申请日期
1954.10.07
申请人
HARRY HERMAN ROSS
发明人
分类号
B42F17/02
主分类号
B42F17/02
代理机构
代理人
主权项
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