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发明名称
摘要
申请公布号
JPH0384549(U)
申请公布日期
1991.08.27
申请号
JP19890145982U
申请日期
1989.12.20
申请人
发明人
分类号
H01J31/15;H01J63/06;(IPC1-7):H01J63/06
主分类号
H01J31/15
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