radiator closing nut

例句：

1. 1.The radiator is leaking, and we need to tighten the closing nut to fix it.
   散热器漏水了，我们需要拧紧关闭螺母来修好它。
2. 2. After the car was repaired, the mechanic checked the radiator and tightened the closing nut.
   汽车修理完毕后，技师检查了散热器并拧紧了关闭螺母。
3. 3. The radiator is a critical component of the engine, and any leaks should be addressed immediately.
   散热器是发动机的关键部件，任何泄漏都应该立即处理。