rotatory machine meaning in Chinese

六角网眼纱织机

The submarine noise detected by sonar consists of two parts : propeller - generated hydro - dynamical noise , which can be greatly reduced by improving the submarine rear shape ; radiated noise from the submarine structure excited by the centrifugal forces ( moments ) of rotatory machine , which is more complicated and influenced by many factors
声纳所探测的潜艇噪声包括两部分，一是螺旋桨运转带来的水动力噪声，二是潜艇主机工作时产生的不平衡力和力矩引起潜艇结构振动，带动流场振动从而辐射噪声。通过改进潜艇尾部线型设计，已将水动力噪声降到比较低的程度，而结构噪声则复杂得多，与许多因素有关。