tube heater

例句：

1. 1.The tube heater is designed to heat up the water quickly.
   这个管状加热器设计用来快速加热水。
2. 2. The tube heater was a popular choice for heating up small spaces.
   这个管状加热器是加热小空间的热门选择。
3. 3. The tube heater was easy to install and maintain.
   这个管状加热器安装和保养都很容易。