rotary retort furnace with internal screw

例句：

1. 1.The rotary retort furnace is used for melting metals.
   旋转式熔炉用于熔化金属。
2. 2. The rotary retort furnace has a high efficiency and low energy consumption.
   旋转式熔炉效率高，能耗低。
3. 3. The rotary retort furnace is widely used in the metallurgy industry.
   旋转式熔炉在冶金工业中广泛使用。