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发明名称
摘要
申请公布号
JPH0276456(U)
申请公布日期
1990.06.12
申请号
JP19880155703U
申请日期
1988.11.29
申请人
发明人
分类号
H01J9/34;H01J9/32;(IPC1-7):H01J9/32
主分类号
H01J9/34
代理机构
代理人
主权项
地址
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