...节流来降低进气压力或提高排气压力；通过辅助装置或活塞本身的压力将废气压入进气管；通过在进气管加装文曲利管（Venturi Pipe），降低EGR接头处的进气压力；利用压力波动等。其中采用文曲利管EGR系统能较方便地在高工况下实现排气再循环.
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We optimized the other two important components of the catalytic water heater, the venturi pipe and nozzle.
文丘里管和喷嘴是催化燃烧热水器的关键组分，实验中对二者进行了优化。
An automatic topdressing system was designed on the base of the principle of hydrokinetics using energy of static pressure for pipe irrigation and the feature of Venturi pipe in solar greenhouse.
依据流体动力学原理，利用日光温室管网灌溉的静压能和文丘里管的特性，设计出在日光温室正常灌溉情况下的自动施肥系统。
The paper also discussed the structure parameters and the flow-speed of the throat-pipe and water volume needed and pressure loss of the Venturi tube in the new dusting system.
本文还对新型除尘系统中文氏管的结构参数、文氏管的喉管流速和文氏管的用水量及压力损失等参数进行了探讨。
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