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发明名称
Vacuum tube
摘要
申请公布号
US1935723(A)
申请公布日期
1933.11.21
申请号
US19310566887
申请日期
1931.10.05
申请人
GENERAL ELECTRIC COMPANY
发明人
LEMS HENDRIK
分类号
H01J17/34;H01J61/35
主分类号
H01J17/34
代理机构
代理人
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地址
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