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发明名称
Perfectionnements apportés aux appareils récepteurs d'ondes de t. s. f.
摘要
申请公布号
FR707790(A)
申请公布日期
1931.07.15
申请号
FRD707790
申请日期
1930.12.13
申请人
发明人
GREGOR DONALD ROY MAC
分类号
H03J1/04
主分类号
H03J1/04
代理机构
代理人
主权项
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