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发明名称
Improvements in card indexes and the like
摘要
申请公布号
GB576208(A)
申请公布日期
1946.03.22
申请号
GB19440007884
申请日期
1944.04.27
申请人
CURT HELGESSON FAHLSTEDT
发明人
分类号
B42F17/34;G06K21/02
主分类号
B42F17/34
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