... widely used in such area ,which calls for heating element ,as agricultural science and technology,communication,medical appliances,daily living equipment ... heated air- conditioning,electric hair-drier,Clothes dry machine,warming machine, electric cooker,water heater,electric censer etc)2 ... drier series,sealing machine,UTR the cylinder to prevent condenser,the heating of water,oil,acids, and alkali,etc)4 ...