Imagine your sitting on your front garden admiring the shining sun when your neighbour comes with that annoying car with the buzzing sound and the exhaust pipe blows out this horrible black smoke.
设想一下，你正坐在自家的宅前花园中享受着明媚的阳光，这时，你的邻居开着那辆嘟嘟作响、排气管冒着可怕黑烟的汽车过来了。
But even if it is a ventilation pipe is also divided into several, there is a simple dust, smoke, exhaust pipe, but also have a special rule out harmful gas pipeline.
但就算是通风管道也分成好几种，有简单除尘、排烟、吸油的排风管，但也有专门排除有害气体的管道。
The exhaust pipe influences air supply and smoke exhaust, that can induce incomplete combustion and efficiency decline.
排烟管的设计安装不当将影响空气的供给，从而引起燃烧不完全和火焰拉长现象，导致热效率下降。
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