down-convection box type heater的意思|示意

烟气下行式对流箱式炉 ...urized convection heater 加压对流加热器 down-convection box type heater 烟道气下行对流箱式加热炉 ; 烟气下行式对流箱式炉 natural-convection type air heater 自然对流型空气加热器 ..

烟道气下行对流箱式加热炉 ... down-and-up cut unit 双动剪切机 down-convection box type heater 烟道气下行对流箱式加热炉 down-convection heater 烟道气下行对流加热式炉 ...