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经营范围
发明名称
ELECTRON GUN
摘要
申请公布号
JPH03205743(A)
申请公布日期
1991.09.09
申请号
JP19900000660
申请日期
1990.01.08
申请人
HITACHI LTD
发明人
TAKAYAMA SHIGEHIKO
分类号
H01J29/50
主分类号
H01J29/50
代理机构
代理人
主权项
地址
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