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发明名称
Improvements in or relating to electron lens
摘要
申请公布号
GB722096(A)
申请公布日期
1955.01.19
申请号
GB19510012955
申请日期
1951.05.31
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
分类号
H01J37/143
主分类号
H01J37/143
代理机构
代理人
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