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发明名称
ULTRAHIGH FREQUENCY ELECTRON TUBE
摘要
申请公布号
JPH03159029(A)
申请公布日期
1991.07.09
申请号
JP19890298875
申请日期
1989.11.17
申请人
HITACHI METALS LTD
发明人
SHIMOE OSAMU
分类号
H01J23/24
主分类号
H01J23/24
代理机构
代理人
主权项
地址
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