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经营范围
发明名称
Appareil à rayon cathodique
摘要
申请公布号
FR852163(A)
申请公布日期
1940.01.25
申请号
FRD852163
申请日期
1939.03.27
申请人
ELECTRICAL RESEARCH PRODUCTS INC.
发明人
分类号
H01J31/12
主分类号
H01J31/12
代理机构
代理人
主权项
地址
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