hidden arc furnace

例句：

1. 1. Thehidden arc furnace is a secretiveprocess that produces high-quality steel.
   隐蔽的弧炉是一种秘密的过程，可以生产高质量的钢材。
2. 2. The hidden arc furnace isused in the production of stainless steel,which is highly resistant to corrosion.
   隐蔽的弧炉用于生产不锈钢，这种钢具有很强的耐腐蚀性。
3. 3. The hiddenarc furnace is animportant tool for metallurgical engineers, as it allowsthem to control the temperature and pressure insidethe furnace.
   隐蔽的弧炉是冶金工程师的重要工具，因为它允许他们控制炉内的温度和压力。