2. The reduction of noise lever measured in the acceleration on the pipe wall is obtained about 6 to 10
decibel.
结果表明,对于泵的额定工况,所采用的方法可达到管壁振动加速度降低6-10分贝。
3. The
decibel count goes steadily up in high-energy societies, and more and more people suffer from defective hearing.
当下高耗能社会所产生的噪音分贝在与日俱增,越来越多的人出现了听力障碍。