Variable-tap regulating transformer (Rankin Kennedy, Electrical Installations, Vol II, 1909).jpg
en
Variable tap regulating transformer (Rankin Kennedy, Electrical Installations, Vol II, 1909), Historic transformers, Scans from 'Rankin Kennedy, Electrical Installations, Vol II', 1909, Scans from 'Rankin Kennedy, Electrical Installations, Vol II', 1903/undescribed
commons
ja
変圧器の制御装置
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