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发明名称
Document filing system
摘要
申请公布号
GB729785(A)
申请公布日期
1955.05.11
申请号
GB19520031595
申请日期
1952.12.12
申请人
LEIDULF SELSETH
发明人
分类号
B42F17/02
主分类号
B42F17/02
代理机构
代理人
主权项
地址
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