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发明名称
ELECTRIC FIELD EMITTING ELECTRON GUN
摘要
申请公布号
JPH03159045(A)
申请公布日期
1991.07.09
申请号
JP19890299314
申请日期
1989.11.17
申请人
JEOL LTD
发明人
OBARA KENJI
分类号
H01J37/073;H01J37/248
主分类号
H01J37/073
代理机构
代理人
主权项
地址
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