5311359 A woodcut engraving depicting perpetual motion by magnetism. A is a spherical magnet with its poles on either side. A piece of iron lies at D and is attracted up the slide C B to E. Here it strikes the wall of the container and drops down to D again, 17th century; (add.info.: Date: 1754); Universal History Archive/UIG.

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TOP27752701

Source:

達志影像

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RM

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須由TPG 完整授權

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No

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No

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