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经营范围
发明名称
Improvements in or relating to electron velocity modulation apparatus
摘要
申请公布号
GB649273(A)
申请公布日期
1951.01.24
申请号
GB19480002003
申请日期
1948.01.22
申请人
STANDARD TELEPHONES AND CABLES LIMITED
发明人
分类号
H01J25/12
主分类号
H01J25/12
代理机构
代理人
主权项
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