The open wire heating elements are usually made of nichrome wire. 裸線(xiàn)式電熱元件通常用鎳鉻合金絲制成。
Although the possibility is remote3, diode failure4 might eventually cause a small section of bare wire to contact the metal cabinet. 雖然這種可能性很小，但二極管故障可能最終導致一小部分裸線(xiàn)與金屬盒接觸。
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