The open wire heating elements are usually made of nichrome wire. 裸线式电热元件通常用镍铬合金丝制成。
Although the possibility is remote3, diode failure4 might eventually cause a small section of bare wire to contact the metal cabinet. 虽然这种可能性很小，但二极管故障可能最终导致一小部分裸线与金属盒接触。
