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发明名称
Entrée d'électrode pour appareils à décharge dans le vide, par exemple les redresseurs à vapeur de mercure à enveloppe métallique
摘要
申请公布号
FR48684(E)
申请公布日期
1938.05.23
申请号
FRD48684
申请日期
1937.07.26
申请人
发明人
LEHMANN WALTER
分类号
H01J5/42
主分类号
H01J5/42
代理机构
代理人
主权项
地址
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