n.预加热器
Once installed, this heater operates automatically. 一旦安装好以后，这加热器就会自动地运行。
This heater needs a new element. 这个加热器需要一组新电阻丝。
The heater in my car doesn't work properly. 我汽车里的暖气设备出了点毛病。
pre heater 预加热器
You'll run up a huge gas bill if you leave the heater on. 热水器要是总开著，煤气费就很高了。
