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发明名称
Electron lens
摘要
申请公布号
US2919381(A)
申请公布日期
1959.12.29
申请号
US19560600135
申请日期
1956.07.25
申请人
FARRAND OPTICAL CO., INC.
发明人
GLASER WALTER
分类号
H01J37/153
主分类号
H01J37/153
代理机构
代理人
主权项
地址
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