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发明名称
Procédé pour la fabrication d'une cathode chaude pour tubes électroniques
摘要
申请公布号
FR1131224(A)
申请公布日期
1957.02.19
申请号
FRD1131224
申请日期
1955.09.07
申请人
PATELHOLD PATENTVERWERTUNGS & ELEKTRO-HOLDING A. G.
发明人
分类号
H01J9/04
主分类号
H01J9/04
代理机构
代理人
主权项
地址
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