车轮滚动。
A coasting performance test is simulated on a chassis dynamometer, the transmission resistance, rolling resistance of wheels and their speed factors are measured.
利用底盘测功机模拟道路滑行试验，测定出汽车的传动系阻力、轮胎滚动阻力及它们的速度影响系数。
Further theoretical analysis and experiments are made of the principle of the cold forming and design of rolling wheels, and some useful conclusions are drawn.
从冷轧原理、轧辊设计等方面作了进一步的理论分析和工艺试验，得出了一些有用的结论。
The wheels, axles and bearings of locomotives and rolling stock in China Railway are generally described.
概述了中国铁路机车车辆车轮、车轴和轴承的基本情况。
The utility model discloses a slide rail device for drawers, comprising fixed slide bars, movable slide bars, and rolling wheels which are arranged on the slide bars.
一种用于抽屉的滑轨装置，是由固定滑条、移动滑条和由装在其滑条上的滚轮组成。
The utility model discloses a slide rail device for drawers, comprising fixed slide bars, movable slide bars, and rolling wheels which are arranged on the slide bars.
一种用于抽屉的滑轨装置，是由固定滑条、移动滑条和由装在其滑条上的滚轮组成。
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