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经营范围
发明名称
Electron discharge device
摘要
申请公布号
GB693567(A)
申请公布日期
1953.07.01
申请号
GB19500005800
申请日期
1950.03.07
申请人
SYLVANIA ELECTRIC PRODUCTS, INC.
发明人
分类号
H01J19/38
主分类号
H01J19/38
代理机构
代理人
主权项
地址
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