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发明名称
Fremgangsmaade til Forhindring af Sværtning af Glødelamper.
摘要
申请公布号
DK53971(C)
申请公布日期
1937.12.06
申请号
DKD53971
申请日期
1934.12.29
申请人
CHRISTIAN ALBERT OLSEN
发明人
CHRISTIAN ALBERT OLSEN
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主分类号
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