译文：AGV is the abbreviation of Automated Guided Vehicle, which means "Automated Guided Vehicle". There are four McNum wheel sets installed on the chassis frame. The McNum wheel sets are originated from McNum Company in Sweden. So the wheel can slide sideways. The bus bar of the hub assembly is very special. As the hub rotates the main shaft, the envelope of each roller assembly is cylindrical, so that the hub can continuously roll forward. The McNamler is compact and flexible, and is a very successful omnidirectional wheel. With four of these new wheel combinations, the transport vehicle can be more flexible and convenient to achieve a full range of movement.