城市安全系统通过装在风挡玻璃后的激光传感器监视前方路段，计算出相关车速和距离并在事故无法避免时紧急刹车（城市安全系统在行驶速度很低时是关闭的，这样方便驾驶员可以把车近距离停放在其它车辆旁边）。
It applies the brakes if a collision cannot be avoided. (The system switches off at very low speeds, so that drivers can park close to other vehicles.)
引擎和动力传动系统、刹车系统、底盘、外型、内部以及诸如灯、挡风玻璃雨刷和紧急刹车装置都是关键的组件和子组件。
Engines and drivetrains, braking systems, chassis, exterior, interior, and safety features like lights, windshield wipers, and emergency brakes were key components and subcomponents.
该系统设计合理、安全可靠，完全满足钻机起下钻和紧急刹车，在轻型钻机和修井机上，具有很好的应用前景。
The system design is reasonable, safe and reliable, fully meet the normal tripping and emergency brake of drilling rig, the light drilling and workover machines, has a good application prospect.
该系统设计合理、安全可靠，完全满足钻机起下钻和紧急刹车，在轻型钻机和修井机上，具有很好的应用前景。
The system design is reasonable, safe and reliable, fully meet the normal tripping and emergency brake of drilling rig, the light drilling and workover machines, has a good application prospect.
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