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History
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Exhibit in the Science Museum in London, England. This conjectural model chariot incorporates a differential gear.
Exhibit in the Science Museum in London, England. This conjectural model chariot incorporates a differential gear.
An image of a south-pointing chariot from Sancai Tuhui (first published 1609)
An image of a south-pointing chariot from Sancai Tuhui (first published 1609)
Children's instructive toy chariot in Chinese display at Expo 2005 in Japan
Children's instructive toy chariot in Chinese display at Expo 2005 in Japan
An illustration of a differential between the drive shaft (at bottom right) and driving wheels of an automobile
An illustration of a differential between the drive shaft (at bottom right) and driving wheels of an automobile
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A modern military compass, with included sight device for aligning
A modern military compass, with included sight device for aligning
Model of a lodestone compass from Han dynasty
Model of a lodestone compass from Han dynasty
A liquid-filled protractor or orienteering compass with lanyard
A liquid-filled protractor or orienteering compass with lanyard
Cammenga air filled lensatic compass
Cammenga air filled lensatic compass