... ,Cummins,Sinotruck,Deutz,Steyr,Benz,Man series and so on.We can design and make according to customers' requirements,with ... .Surface Treatment: Graphite spray, graphite printing,anodic oxygenation and tin plating 7.Phosphating product line8.Frenquency-changing furnance( ... oval in skirt,spraying and coating graphite in skirt,hardening anodic oxidation in top etc...Stery and Cummins B series pistons are ...