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发明名称
Improvements relating to devices for securing sheets of paper, files and the like
摘要
申请公布号
GB394481(A)
申请公布日期
1933.06.29
申请号
GB19320016087
申请日期
1932.06.07
申请人
EDMOND JOSEPH GUSTAVE VERHULST
发明人
分类号
B42F17/18
主分类号
B42F17/18
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