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发明名称
摘要
申请公布号
JPH01155641(U)
申请公布日期
1989.10.25
申请号
JP19880052512U
申请日期
1988.04.18
申请人
发明人
分类号
H01J29/48;(IPC1-7):H01J29/48
主分类号
H01J29/48
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代理人
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地址
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