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发明名称
摘要
申请公布号
JPS53106662(U)
申请公布日期
1978.08.26
申请号
JP19770010585U
申请日期
1977.02.02
申请人
发明人
分类号
H01J31/20;H01J29/02;H01J29/07;(IPC1-7):H01J29/07
主分类号
H01J31/20
代理机构
代理人
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地址
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