电缆露出了裸线。
裸线式电热元件通常用镍铬合金丝制成。
The open wire heating elements are usually made of nichrome wire.
裸线由蒸汽保护，以阻止裸铜线被氧化。
The bare wire was protection by steam, so prevent copper bare wire oxidation.
裸线由蒸汽保护，以阻止裸铜线被氧化。
The bare wire was protection by steam, so prevent copper bare wire oxidation.
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