radiator bottom header

例句：

1. 1.The car's radiator bottom header is causing the engine to overheat.
   汽车的散热器底部接头导致发动机过热。
2. 2.The technician had to replace the radiator bottom header to fix the leak.
   技术人员不得不更换散热器底部接头来修复泄漏。
3. 3.The manufacturer recommends replacing the radiator bottom header after every oil change.
   制造商建议在每次换油后更换散热器底部接头。