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发明名称
Perfectionnements aux grilles des lampes électriques à vide
摘要
申请公布号
FR701652(A)
申请公布日期
1931.03.20
申请号
FRD701652
申请日期
1930.09.03
申请人
ASSOCIATED ELECTRICAL INDUSTRIES LIMITED
发明人
分类号
H01J19/38
主分类号
H01J19/38
代理机构
代理人
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地址
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