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发明名称
Perfectionnements aux amplificateurs à lampes
摘要
申请公布号
FR982394(A)
申请公布日期
1951.06.11
申请号
FRD982394
申请日期
1949.03.07
申请人
MARCONI'S WIRELESS TELEGRAPH COMPANY LIMITED
发明人
分类号
H03F3/32;H03F3/44
主分类号
H03F3/32
代理机构
代理人
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地址
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