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经营范围
发明名称
Cathode assembly
摘要
申请公布号
GB931890(A)
申请公布日期
1963.07.17
申请号
GB19620017508D
申请日期
1962.05.07
申请人
SYLVANIA ELECTRIC PRODUCTS INC.
发明人
分类号
H01J1/20
主分类号
H01J1/20
代理机构
代理人
主权项
地址
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