Zoomlion Conveying Cylinder HBYM GROUP LIMITED produce the Zoomlion conveying delivery cylinder,we use German technology to chrome inner side of delivery cylinder.After the chromming,the inner side hardness could be HV900.The thickness of our chroming could be 0.25~0.30mm,our delivery cylinder could work a longer time than others. Size we can produce:DN260*2250 DN230*2250 DN230*1800 DN230*2306 DN230*1850 DN200*2306 DN200*2032 DN200*2012 DN200*1960 DN200*1862 DN200*1800 DN200*1200 Product Name Zoomlion Concrete Pump Delivery Conveying Cylinder Chrome thickness 0.25mm-0.30m…