“排气装置”常见的英文表达是 exhaust device 或 exhaust system(后者更常用于指代汽车、发动机等较为复杂的整套排气系统) 。
例如:
The exhaust device on this machine needs to be checked regularly.(这台机器上的排气装置需要定期检查。)
The car's exhaust system is crucial for reducing emissions.(汽车的排气系统对减少排放至关重要。)