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by DonaldFisk
1545 days ago
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> The vast majority of the world uses the metric system for all measurements. Except for times and angles (only the second and the radian are SI). Also, aviators everywhere outside of PRC and North Korea use feet and flight levels (hundreds of feet) for altitude, and navigators (in the air and at sea) use nautical miles and knots. Other widely used non-metric units include mmHg for pressure, AU and parsec for astronomical distances, and eV for energy. |
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