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发明名称
Improvements in or relating to frequency-transformation devices
摘要
申请公布号
GB853149(A)
申请公布日期
1960.11.02
申请号
GB19570023598
申请日期
1957.07.25
申请人
PHILIPS ELECTRICAL INDUSTRIES LIMITED
发明人
分类号
H03B19/03;H04J1/06
主分类号
H03B19/03
代理机构
代理人
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