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经营范围
发明名称
Improvements in and relating to secondary electron emission apparatus
摘要
申请公布号
GB658972(A)
申请公布日期
1951.10.17
申请号
GB19480001416
申请日期
1948.01.16
申请人
PHILCO CORPORATION
发明人
分类号
G01S13/534
主分类号
G01S13/534
代理机构
代理人
主权项
地址
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