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发明名称
Improvements in or relating to cathode ray devices
摘要
申请公布号
GB526534(A)
申请公布日期
1940.09.19
申请号
GB19390008774
申请日期
1939.03.20
申请人
ELECTRICAL RESEARCH PRODUCTS INC.
发明人
分类号
H01J31/12
主分类号
H01J31/12
代理机构
代理人
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