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发明名称
Electron tube
摘要
申请公布号
US1812489(A)
申请公布日期
1931.06.30
申请号
US19280249579
申请日期
1928.01.26
申请人
SIEMENS-SCHUCKERTWERKE AKTIENGESELLSCHAFT
发明人
KRUGER ALBERT
分类号
H01J5/42
主分类号
H01J5/42
代理机构
代理人
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地址
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