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发明名称
ROTARY CARD FILING DEVICES
摘要
申请公布号
CA467823(A)
申请公布日期
1950.09.05
申请号
CAD467823
申请日期
申请人
EMIL E. KNITTEL
发明人
EMIL E. KNITTEL
分类号
主分类号
代理机构
代理人
主权项
地址
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