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经营范围
发明名称
Improvements in and relating to apparatus for exhausting electronic tubes and like envelopes
摘要
申请公布号
GB778009(A)
申请公布日期
1957.07.03
申请号
GB19550015402
申请日期
1955.05.27
申请人
GENERAL ELECTRIC COMPANY
发明人
分类号
H01J9/38;H01J9/385
主分类号
H01J9/38
代理机构
代理人
主权项
地址
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