... at random as required by customers.About Our Heater/ Ceramic Heater ² Ceramic heater is manufactured by sintering in high temperature above 1600 ... harmful to the human body and rather it radiates far-infrared rays beneficial to the human body by itself, so ... , hot air blower, dryer, electric boiler, evaporator of petroleum stove, various metal mold thermostats, medical instruments (the curer of women ...