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发明名称
摘要
申请公布号
JPS55135353(U)
申请公布日期
1980.09.26
申请号
JP19790034326U
申请日期
1979.03.19
申请人
发明人
分类号
H01J31/46;H01J29/86;H01J29/92;H01J31/26;(IPC1-7):H01J29/92
主分类号
H01J31/46
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