Polarised electric bell (Rankin Kennedy, Electrical Installations, Vol V, 1903).jpg
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Polarised electric bell (Rankin Kennedy, Electrical Installations, Vol V, 1903), Polarised bell, circa 1903
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有極ベル 1903年頃の図解。
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Polarised electric bell (Rankin Kennedy, Electrical Installations, Vol V, 1903), Electric bell diagrams, Scans from 'Rankin Kennedy, Electrical Installations, Vol V', 1903, Scans from 'Rankin Kennedy, Electrical Installations, Vol V', 1903/undescribed
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A map of the alimento bell c. 1903.
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偏光電鈴
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偏光電鈴
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electric bell rankin electrical work electrical