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发明名称
Cathode à émission secondaire pour tube à rayon cathodique
摘要
申请公布号
FR830049(A)
申请公布日期
1938.07.19
申请号
FRD830049
申请日期
1937.11.27
申请人
FERNSEH AKT.-GES.
发明人
分类号
H01J29/48
主分类号
H01J29/48
代理机构
代理人
主权项
地址
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