Isifudumezi se-coil sase-Spring senziwe nge-nickel chrome yokumelana nocingo olubekwe ngaphakathi kwityhubhu yentsimbi ye-nickel ezaliswe ngumgubo we-MgO.Isifudumezi se-coil yaseNtwasahlobo sikwabizwa ngokuba zizifudumezi eziphezulu ze-tubular okanye izifudumezi zentambo.Ukufudumala kwentwasahlobo kunokuveliswa kunye okanye ngaphandle kokwakhiwa kwe-thermocouples.I-heater coil yasentwasahlobo isetyenziswa kakhulu kubunjineli bokufudumeza, ukungunda, ishishini leplastiki, kubandakanya oomatshini bokudlulisa, inkqubo yokuphosa, ukuwelda, inkqubo yonyango lobushushu kunye namanye amashishini amaninzi kunye namasimi.