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发明名称
METHOD OF MAKING INCANDESCENT CATHODES
摘要
申请公布号
CA530003(A)
申请公布日期
1956.09.04
申请号
CAD530003
申请日期
申请人
N.V. PHILIPS GLOEILAMPENFABRIEKEN
发明人
ROBERTO LEVI
分类号
主分类号
代理机构
代理人
主权项
地址
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