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发明名称
Mehrfache elektrische Entladungsröhre
摘要
申请公布号
AT163397(B)
申请公布日期
1949.06.25
申请号
ATD163397
申请日期
1947.12.18
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
分类号
主分类号
代理机构
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