高速公路隔声屏障作为一种经济有效的方法，是降低交通噪声的主要措施。
As an economical and effective method, the expressway noise barrier is a primary measure to reduce traffic noise.
介绍了内燃动车降低噪声的措施。
The measures to reduce noise inside diesel motor cars are introduced.
齿轮油泵采用斜齿轮是降低机械噪声和减小流量脉动的一种有效措施。
Use of helical gear in gear pump is an effective measure, which can reduce the mechanical voice and flow pulse.
应用推荐