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经营范围
发明名称
Improvements in or relating to electric discharge tubes
摘要
申请公布号
GB643023(A)
申请公布日期
1950.09.15
申请号
GB19470009689
申请日期
1947.04.11
申请人
PHILIPS LAMPS LIMITED
发明人
分类号
H01J13/14;H01J13/48
主分类号
H01J13/14
代理机构
代理人
主权项
地址
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