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发明名称
Reading rate controller
摘要
申请公布号
US2925670(A)
申请公布日期
1960.02.23
申请号
US19580733447
申请日期
1958.05.06
申请人
FRENCH GEORGE F
发明人
FRENCH GEORGE F.
分类号
G09B17/04
主分类号
G09B17/04
代理机构
代理人
主权项
地址
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