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822

Centuries: 8th century - 9th century - 10th century

Decades: 770s 780s 790s 800s 810s - 820s - 830s 840s 850s 860s 870s

Years: 817 818 819 820 821 - 822 - 823 824 825 826 827


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Dynabee

... is slipping around inside the groove, the friction between the axis and the groove rims will accelerate or brake the spinning gyroscope, with a maximum effect when the axi ...

 
 
 
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