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Application filed by Bbc Brown Boveri & CiefiledCriticalBbc Brown Boveri & Cie
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Publication of DK47617CpublicationCriticalpatent/DK47617C/da
DK47617D1930-09-101931-08-24Anordning til automatisk Tændpunktsforskydning i styrede Metaldampsventiler til Omformning af Jævnstrøm til Vekselstrøm.
DK47617C
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