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经营范围
发明名称
Improvements in or relating to travelling-wave tubes
摘要
申请公布号
GB774240(A)
申请公布日期
1957.05.08
申请号
GB19550010567
申请日期
1955.04.12
申请人
COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL
发明人
分类号
H01J23/28
主分类号
H01J23/28
代理机构
代理人
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