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发明名称
Gasgefüllte elektrische Entladungsröhre.
摘要
申请公布号
AT151904(B)
申请公布日期
1937.12.10
申请号
ATD151904
申请日期
1937.02.17
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
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主分类号
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