... paint spraying equipments such as airless paint sprayer, airless pump machine, pneumatic airless painting pump, piston paint sprayer, gas power ... Penetration,increasing the bonding between coating and wall ,so the coating life is longer.4, Making the coating smooth,to improve working quality ... Rod, Compression Nut, Hexagon Clamping Nut, Power Rollers and so on.. coating machine ,airless sprayer