adjustable hitch bar

例句：

1. 1.The adjustable hitch bar on the back of the truck allows for easy attachment of trailers.
   卡车后部的可调节挂钩杆使挂车安装变得简单。
2. 2. The adjustable hitch bar is a crucial part of the vehicle's suspension system.
   可调节的挂钩杆是车辆悬挂系统的关键部分。
3. 3.The adjustable hitch bar ensures that the trailer doesn't pull away from the truck during heavy loads.
   可调节的挂钩杆确保在重载时拖车不会从卡车上脱落。