... roller,box type substructure,Synchronous deflection,Automatic conveying device, effective length is 12m Out-convey:24 sets ... substructure,Synchronous deflection,Automatic conveying device, effective length is 12m Shelf: 8#U-steel,effective length is 12m, ... double-groove,qualified product and defective product divided.Automatic electric control. Application: Applied to the ...