本文论述了车用发动机试验台排气系统中的三节扩张式消声坑的设计和试验结果。
In this paper the design and performance of expanding silencing exhaust duct for the test bed of automotive engines are discussed.
在地球上，他们能被任何发生燃烧反应的地方，例如烤肉坑和排气管中。
On Earth, they are found anywhere combustion reactions take place, such as barbeque pits and exhaust pipes.
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