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经营范围
发明名称
Improvements in or relating to objects comprising a ring-or disc-shaped metal part which is sealed to an insulating part
摘要
申请公布号
GB337086(A)
申请公布日期
1930.10.30
申请号
GB19290024042
申请日期
1929.08.06
申请人
N.V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
分类号
C03C27/04
主分类号
C03C27/04
代理机构
代理人
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