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Chongqing Vanke 17 miles / sushui-design
Our earth rotates at an average angular rate of 4.167 x 10-3 degrees/ sec. A rotation takes 23 hours and 56 minutes, namely about an ordinary day. Because of the rotation of the earth, there is the alternation of day and night, so that there is the rise a
Chongqing Vanke 17 miles / sushui-design
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