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经营范围
发明名称
Electron tube
摘要
申请公布号
GB816082(A)
申请公布日期
1959.07.08
申请号
GB19560039457
申请日期
1956.12.28
申请人
EITEL-MCCULLOUGH, INC.
发明人
分类号
H01J21/02
主分类号
H01J21/02
代理机构
代理人
主权项
地址
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