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发明名称
摘要
申请公布号
JPH0257555(U)
申请公布日期
1990.04.25
申请号
JP19880136889U
申请日期
1988.10.20
申请人
发明人
分类号
H01J61/30;H01J61/42;(IPC1-7):H01J61/30
主分类号
H01J61/30
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