radiator upper tank

例句：

1. 1. The car has a heater upper tank that can heat up to 20 gallons of water.
   这辆车有一个可以加热到20加仑水的加热器上水箱。
2. 2. The new model car has an improved heater upper tank that provides better heating efficiency.
   新款汽车改进了加热器上水箱，提供了更好的加热效率。
3. 3.The radiator upper tank is essential for maintaining the vehicle's temperature during cold weather conditions.
   在寒冷天气条件下，散热器上水箱对于保持车辆温度至关重要。