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发明名称
Verfahren zur Einfuehrung einer Traegerfrequenz in gasgefuellte, mit einer positiv vorgespannten Hilfselektrode ausgeruestete Photozellen
摘要
申请公布号
DE643146(C)
申请公布日期
1937.03.30
申请号
DE1932G084388D
申请日期
1932.12.25
申请人
DR. HANS RICHTER
发明人
分类号
H04N5/30
主分类号
H04N5/30
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代理人
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