Container cargo transportation ramp. The ramp for unloading containers with forklifts is a container cargo transportation ramp invented by Yangzhou Tongli Refrigerated Container Co., Ltd. and applied for a patent on May 25, 2016. Forklifts are industrial transport vehicles, which refer to various wheeled transport vehicles that are used for loading, unloading, stacking and short-distance transportation of palletized goods. The International Organization for Standardization ISO/TC110 is called industrial vehicles. It is often used for the transportation of large items in warehouses and is usually powered by a fuel engine or battery.