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发明名称
Space discharge device
摘要
申请公布号
US1821808(A)
申请公布日期
1931.09.01
申请号
US19270216679
申请日期
1927.08.31
申请人
GENERAL ELECTRIC COMPANY
发明人
HULL ALBERT W.
分类号
H01J40/00
主分类号
H01J40/00
代理机构
代理人
主权项
地址
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