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发明名称
Improvements in velocity-modulated valves
摘要
申请公布号
GB692699(A)
申请公布日期
1953.06.10
申请号
GB19490019159
申请日期
1949.07.20
申请人
COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL
发明人
分类号
H01J25/30
主分类号
H01J25/30
代理机构
代理人
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