hearth ring machine

例句：

1. 1. This hearth ring machine isvery efficient in heating the room.
   这个炉圈机在加热房间方面非常高效。
2. 2.The hearth ring machine was used toheat the house during the winter.
   炉圈机在冬天被用来取暖房子。
3. 3. Thehearth ring machine has been a popularchoice for many years.
   炉圈机多年来一直是受欢迎的选择。