19th Century induction coil. Illustration of an electrical coil inductor (Ruhmkorff coil) with a Foucault switch, as designed by the German instrument maker Heinrich Daniel Ruhmkorff (1803-1877). Published in 'Physique populaire' by Emile Desbeaux (1891).
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Creative#:
TOP26231752
Source:
達志影像
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RM
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