This system has been installed on electric resistance welded pipe production line which demands to decrease electricnoise.
这个系统现已安装在了需要降低电气噪音的电阻焊管生产线上。
2
Lotus has worked on a number of hybrid and electric vehicles and it was while these were moving around its factory that the engineers thought they would be safer if they made a noise.
莲花公司曾经为许多混合型和电动汽车安装声音系统，安装过程中，工程师们都认为能够发声的汽车更加安全。
3
In the C30 Electric you get none of that, nor is there really much wind noise to give you any sense of speed. In fact, we didn't really hear any unpleasant sounds until we'd parked the thing.