of or relating to or produced by the open-hearth process
例句
用作名词 (n.)
One way to do this is by using an open hearth furnace,where pig iron and scrap steel are heated. 炼钢的一种方法是将生铁和废钢放在平炉内加热。
The fuel burner of an open - hearth furnace is water - cool, as is the valve that regulates the flow of air and waste gases. 平炉的燃料燃烧室是用水冷却的,控制空气和废气的阀也是水冷的。