Na farko, kayan rufi na coil yana haifar da bambanci, ƙananan injunan wutar lantarki, na'urar tana amfani da waya mai enamelled ko wasu sassauƙan rufi, kamar takarda mai hade, manyan injinan wutan lantarki yawanci suna amfani da tsarin insulation multi-Layer, kamar foda mica tef, tsarin shine mai rikitarwa, mafi girma ...
Kara karantawa