Submerged nozzle must be preheated before casting. Now, burning the coal gas is the usual preheating method.
浸入式水口在浇钢以前必须进行充分预热，利用燃烧的煤气烘烤水口是常用的预热烘烤方式。
youdao
应用推荐
模块上移
模块下移
不移动