ring heater

例句：

1. 1. This ring heater is perfect for heating up a small space.
   这个环形加热器非常适合加热小空间。
2. 2.The ring heater was the only thing that could warm up the room in winter.
   环形加热器是冬天唯一能温暖房间的东西。
3. 3.The ring heater was easy to use and provided good heat.
   环形加热器使用起来简单，提供良好的热量。