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发明名称
Vacuum tube
摘要
申请公布号
US1865752(A)
申请公布日期
1932.07.05
申请号
US19310518936
申请日期
1931.02.28
申请人
SIEMENS & HALSKE, AKTIENGESELLSCHAFT
发明人
GABOR DIONYS
分类号
C03C27/04;F16D51/50
主分类号
C03C27/04
代理机构
代理人
主权项
地址
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