动量 [物理学] (运动物体的质量和速度的乘积) momentum; quantity of motion 广义动量 generalized momentum; 物体下落增进动量。 a falling object gains momentum as it falls. 旋转的陀螺正在失去动量。 the spinning top was losing momentum
直动蒸汽泵 direct acting steam pump; direct-acting steam pump
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The horizontal and vertical momentum loss caused by the shock of heavy rain in low - level wind shear of thunderstorms on the airframe and wing are analyzed , the water film thickness on the airframe and wings estimated , and the flight resistance resulted from raindrops - striking caused by the roughness of airplane when the heavy rain shocks the airplane is discussed 摘要分析了雷暴低空风切变中大雨滴冲击飞机的机身和机翼而引起的水平和垂直动量损失,估算了大雨累计在机身和机翼上的水膜厚度,并讨论了因遇到大雨雨滴冲撞而粗糙化的机体所产生的阻力。