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发明名称
Improved circuit embodying a screened-grip valve
摘要
申请公布号
GB377635(A)
申请公布日期
1932.07.28
申请号
GB19320013700
申请日期
1932.05.12
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
分类号
H03F1/08;H03F1/54;H03H7/01
主分类号
H03F1/08
代理机构
代理人
主权项
地址
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