heavy oil heater

例句：

1. 1. The heavy oil heater is used to heat the building during winter.
   重油加热器用于冬季取暖。
2. 2. The heavy oil heater is very efficient at converting fuel into heat.
   重油加热器在将燃料转化为热能方面非常高效。
3. 3.The heavy oil heater has a long lifespan and low maintenance costs.
   重油加热器具有较长的使用寿命和较低的维护成本。