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经营范围
发明名称
摘要
申请公布号
JPS53119859(U)
申请公布日期
1978.09.22
申请号
JP19770024727U
申请日期
1977.03.01
申请人
发明人
分类号
H01J31/20;H01J29/07;(IPC1-7):H01J29/07
主分类号
H01J31/20
代理机构
代理人
主权项
地址
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