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发明名称
Improvements in systems making use of electronic tubes, especially for frequency changing
摘要
申请公布号
GB628740(A)
申请公布日期
1949.09.05
申请号
GB19460009447
申请日期
1946.03.27
申请人
ANTOINE JEAN MERLES
发明人
分类号
H03D7/06;H03F1/16
主分类号
H03D7/06
代理机构
代理人
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