15:34, 10 марта 2026Силовые структуры
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The Lenovo Modular AI PC concept's second screen can be attached to its lid or moved off to the side like a traditional dual monitor setup. Sam Rutherford for Engadget，更多细节参见新收录的资料
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Now we’re talking! This is how a locomotive can pull a long train of cars with a much greater mass. The engine is pulling forward using steel-on-steel static friction, which is pretty high (0.74), giving it good traction. And the cars have a resistive kinetic friction force with a coefficient that is orders of magnitude smaller.