RELAY EMERGENCY VALVE LEAD RELAY VALVE Material: Aluminum Alloy Machining: CNC machining center Inspection: 100% ... you.1.High quality foot brake valve,hand brake valve,relay valve,protection valve,air dryer,levelling valve and so on2. Strict quality ... machining centerInspection : 100% leakage test and other test.RELAY EMERGENCY VALVE Application: SINO TRUCK,FAW,FOTON,JAC TRUCKWe also develop new ...