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发明名称
摘要
申请公布号
JPH03110750(U)
申请公布日期
1991.11.13
申请号
JP19900020639U
申请日期
1990.02.28
申请人
发明人
分类号
H01J23/34;(IPC1-7):H01J23/34
主分类号
H01J23/34
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代理人
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