arc furnace的用法和樣例：
例句
- This paper describes the study and development of magnesia carbon refractories for DC electric arc furnaces.
本文闡述了直流電弧爐用鎂碳質耐火材料的研究及發展。 - The scrap must be carefully selected to contain exactly the right ingredient before it is sent into the electric furnace.
廢鋼在送進電弧爐熔煉前必須先經過仔細挑選，以保證其成分完全符合要求。
