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发明名称
摘要
申请公布号
JPS644046(U)
申请公布日期
1989.01.11
申请号
JP19870098612U
申请日期
1987.06.29
申请人
发明人
分类号
H01J17/38;(IPC1-7):H01J17/38
主分类号
H01J17/38
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代理人
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地址
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