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发明名称
摘要
申请公布号
JPS57180961(U)
申请公布日期
1982.11.16
申请号
JP19810069001U
申请日期
1981.05.13
申请人
发明人
分类号
H01J31/15;H01J29/32;(IPC1-7):H01J31/15
主分类号
H01J31/15
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