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发明名称
摘要
申请公布号
BE440330(A)
申请公布日期
1941.02.28
申请号
BED440330
申请日期
1941.01.16
申请人
发明人
分类号
H01J5/54;H01J19/66;H01R33/76
主分类号
H01J5/54
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地址
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