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经营范围
发明名称
ELECTRON TUBE DEVICE
摘要
申请公布号
CA593772(A)
申请公布日期
1960.03.08
申请号
CAD593772
申请日期
申请人
HANNES O. G. ALFVEN
发明人
HANNES O. G. ALFVEN
分类号
主分类号
代理机构
代理人
主权项
地址
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