Zhengzhou Gongzheng auto auto parts -

& nbsp; & nbsp; & nbsp; & nbsp; we mainly engaged in brand: open Gongzheng, Junqi, Antigua and Barbuda, haoze, all series of manual control valve, air dryer; relay valve assembly; double cavity braking valve; exhaust frost valve; unloading valve; four circuit protection valve; following the dynamic load valve; quick release valve; isolation switch;