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发明名称
Dispositif servant à engendrer des faisceaux électroniques annulaires
摘要
申请公布号
FR944066(A)
申请公布日期
1949.03.25
申请号
FRD944066
申请日期
1946.08.28
申请人
ELECTRIC & MUSICAL INDUSTRIES LIMITED
发明人
分类号
H01J25/14
主分类号
H01J25/14
代理机构
代理人
主权项
地址
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