Our factory is locate in diankou town, zhuji city,zhejiang provinceof china mainland. we are manufacture of heavy truck control systemaccessories.Our products including hand brake valve, foot brakevalve, spring brake chamber, atr dryer, clutch booster,relay valve,protection valve, trailer control valve,unloader valve and so on.which use in SINOTRUK, BENZ,SCANIA,VOLVO,MAN.