main braking cylinder

例句：

1. 1. The main braking cylinder is responsible for controlling the vehicle's speed and stopping it at a safe distance.
   主制动缸负责控制车辆的速度并安全地停止。
2. 2. During the emergency stop, the main braking cylinder must be engaged to prevent the vehicle from rolling backwards.
   紧急情况下，必须激活主制动缸以防止车辆向后滚动。
3. 3. The main braking cylinder is located in the front of the vehicle, directly under the steering wheel.
   主制动缸位于车辆前部，直接位于方向盘下方。