... Series / Bus Front Heater for Truck / Engineering Vehicle/Bus Our company , CORUN , specialize in the the R&D, manufacture, ... . With the control panel and the regulating valve , which can realize the automatic constant temperature function ;5 . Suitable for bus/ coach ... components of air conditioner , like original brand Compressor , Clutch , Heater , Defroster , Radiator , Fan , Valve and so on . ...