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发明名称
Indirekte ophedet Glødekatode til Udladningsrør.
摘要
申请公布号
DK47725(C)
申请公布日期
1933.09.04
申请号
DKD47725
申请日期
1931.06.18
申请人
FIRMAET GUSTAV GANZ & CO.
发明人
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