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发明名称
Improvements in or relating to travelling-wave electron discharge tubes
摘要
申请公布号
GB671422(A)
申请公布日期
1952.05.07
申请号
GB19490021299
申请日期
1949.08.11
申请人
PHILIPS ELECTRICAL LIMITED
发明人
分类号
H01J25/36;H01J25/38
主分类号
H01J25/36
代理机构
代理人
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