What is called a shuttle? What role does it play in a shuttle-type racking system?

called a crossing car? What is the role of the crossing car rack system?

crossing car is a kind of intelligent robot, which can be programmed to complete things such as picking up goods, walking, abandoning donations, etc., and can communicate with the upper computer or WMS system, connect RFID, bar code and other identification skills, and complete spontaneous identification, access and other functions. There are two important contents in the storage and logistics configuration of the crossing car: the crossing car-type entry and exit system and the crossing car-type storage shelf system. In the past, the trolley running on the fixed track will deliver the goods to the designated address or connection configuration.