exhaust duct

基本解释

Smoke production is assessed by measuring attenuation of a laser beam by smoke in the exhaust duct.
产烟量的评估是通过测量在排气管中烟的光衰减量。
The small eddies created near the exhaust duct cause high frequency noise but downstream of the exhaust jet the larger eddies create low frequency noise.
在排气口附近产生的小涡流引起高频噪声，但是，在排气流后部大的涡流产生低频噪声。
The sound radiated from the exit was linked with the sound source characteristic of diesel engine, and the sound field in the exhaust duct by means of the acoustic transfer matrix method.
并用声学传递矩阵方法建立了柴油机源特性，管内声场与管口辐射噪声的关系。

Consider media accounts of how WD-40 was used to extract a python from a bus exhaust pipe or a burglar stuck in an air duct (yes, he was arrested).
FORBES: Greasy Coca-Cola
Consider the newspaper accounts of how WD-40 was used to extract a python from a bus exhaust pipe or a burglar stuck in an air duct (yes, he was arrested).
FORBES: Johnny One-note