... FOUR-CIRCUIT AIR DRYER Material: Aluminum Alloy Machining: CNC machining center Inspection : 100% leakage ... brake valve,hand brake valve,relay valve,protection valve,air dryer,levelling valve and so on2. Strict quality control at ISO ... process flow and cost effectiveMaterial: Aluminum Alloy, Zinc Alloy, NylonMachining: CNC machining centerAIR DRYER ASSY Application: SINO TRUCK,FAW,FOTON,JAC TRUCKWe ...