When driving across a hill, vehicles do not lose linear velocity. At a certain angle, vehicles start to slip off the hill.
当行驶越过一座山，车辆不失去线性速度。从某个角度看，车辆开始从山上滑下去。
2
Meanwhile, the influences of pipeline internal pressure, wall thickness, crack arrest length and initial crack velocity on the crack driving force (crack propagation) are further studied.
进而分析了管道内压、壁厚、裂纹止裂长度和初始裂纹速度对裂纹驱动力(也即裂纹扩展)的影响。
3
By using the characteristics, the combination of two Hooke's joints with cylindrical gear mechanisms forms the driving system of a differential velocity vane pump.