... lowest layer’s pallet for sliding. The middle layers can do both lifting and sliding movements. Each ... connected chains to complete lifting, usually built for 3-6 layers. 2 Compared with the similar systems, it makes ... in outdoor and can design for 3 ~ 7 layers on the ground; 5 Vehicle from the ground ... , the elevator will vehicle to the ground layer;6 ach group control area leave a lifting channel, ...