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发明名称
Insulating ring and protective device for cathode tube
摘要
申请公布号
GB681684(A)
申请公布日期
1952.10.29
申请号
GB19510010933
申请日期
1951.05.09
申请人
RICHARD ALFRED FISCH
发明人
分类号
H04N5/65
主分类号
H04N5/65
代理机构
代理人
主权项
地址
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