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发明名称
Objectif magnétique à courte distance focale pour microscopes électroniques
摘要
申请公布号
FR852158(A)
申请公布日期
1940.01.25
申请号
FRD852158
申请日期
1939.03.27
申请人
发明人
ARDENNE MANFRED VON
分类号
H01J37/141;H01J37/20
主分类号
H01J37/141
代理机构
代理人
主权项
地址
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