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发明名称
Exciting and modulating system for a photo-electric cell
摘要
申请公布号
GB378497(A)
申请公布日期
1932.08.15
申请号
GB19310014111
申请日期
1931.05.13
申请人
ELECTRICAL RESEARCH PRODUCTS INC.
发明人
分类号
H04N5/30
主分类号
H04N5/30
代理机构
代理人
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