1.Save space & easy to managed; 2.Moulds rank shelf are able to pulled and pushed easily afterloaded, easily storage & re-move with chain block installed; 3.Mould rank disassemble structure, all spare parts are able to assembled at random, space between upper and lower shelf are adjustable, easy to install in any locations; 4.Maximum handling weight of each drawer up to 800Kg; 5.Scientific structure, robust, reliable and safety .