移动式卸船机 moveable ship unloader

移动式卸船机是安装在轮胎或者轨道等移动设备上，可以行走，无需固定在码头等位置上。可分为轮胎移动式和轨道移动式二种。

The movable unloader is installed with tyres or rails for moving, instead of being fixed on the dock. The two types are tyre-movable and rail-movable ones.