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发明名称
摘要
申请公布号
JPH034646(U)
申请公布日期
1991.01.17
申请号
JP19890064731U
申请日期
1989.06.02
申请人
发明人
分类号
H01J31/15;(IPC1-7):H01J31/15
主分类号
H01J31/15
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代理人
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