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发明名称
Elektrische Entladungsröhre.
摘要
申请公布号
AT116535(B)
申请公布日期
1930.02.25
申请号
ATD116535
申请日期
1928.08.11
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
DR. GUSTAV ZECHER
分类号
主分类号
代理机构
代理人
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