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851

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

Decades: 800s 810s 820s 830s 840s - 850s - 860s 870s 880s 890s 900s

Years: 846 847 848 849 850 - 851 - 852 853 854 855 856


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Dynabee

... (Compare with graphic below.) Since this friction force is essential for the device's operation, the groove must not be lubricated. The acceleration of the gyroscope i ...

 
 
 
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