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发明名称
摘要
申请公布号
JPS53148568(U)
申请公布日期
1978.11.22
申请号
JP19770053381U
申请日期
1977.04.28
申请人
发明人
分类号
H01J61/073;H01J61/22;H01J61/88;(IPC1-7):H01J61/22
主分类号
H01J61/073
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代理人
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