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发明名称
Anordning ved Lampeskærme.
摘要
申请公布号
DK44049(C)
申请公布日期
1931.04.27
申请号
DKD44049
申请日期
1928.01.18
申请人
NORDISK ELEKTRICITETS-SELSKAB, J. P. JAKOBSEN & O. EKMAN
发明人
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主分类号
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