... .Graphite spray, graphite print Piston,engine piston for various brands We have supplied products for pistons as follows:FAW,Cummins,Sinotruck ... manufacture and examine a various kinds of pistons for the internal combustion engine.Among these are:austenite resistance to avrasion ... ,controlled ecpand steel plate inserting and casting in skirt,oil cooling channel casting in top,middle frum changing oval ...