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经营范围
发明名称
Tube à décharge comportant une électrode à émission secondaire
摘要
申请公布号
FR926154(A)
申请公布日期
1947.09.23
申请号
FRD926154
申请日期
1946.04.30
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
分类号
H01J43/16
主分类号
H01J43/16
代理机构
代理人
主权项
地址
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