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发明名称
Improvements in document filing systems
摘要
申请公布号
GB955798(A)
申请公布日期
1964.04.22
申请号
GB19630049667
申请日期
1960.05.02
申请人
OTTO ALFRED BECKER
发明人
分类号
B42F15/04
主分类号
B42F15/04
代理机构
代理人
主权项
地址
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