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发明名称
UN PROCEDIMIENTO DE FABRICAR UN TUBO DE DESCARGA PREVISTO PARA FRECUENCIAS MUY ELEVADAS
摘要
申请公布号
ES184994(A1)
申请公布日期
1949.08.01
申请号
ES19940001849
申请日期
1948.08.24
申请人
PHILIPS'GLOEILAMPENFABRIEKEN, N. V.
发明人
分类号
(IPC1-7):H01
主分类号
(IPC1-7):H01
代理机构
代理人
主权项
地址
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