... sets riding wheel,12 sets pinch roller,box type substructure,Synchronous deflection,Automatic conveying device, effective length is 12m Out-convey ... sets riding wheel,12 sets pinch roller,box type substructure,Synchronous deflection,Automatic conveying device, effective length is 12m Shelf: 8 ... system certificateGB/T 7735-2004 steel tubes detecting methods diagnostic machine