求翻译：转向泵噪声的第三个原因是机械振动引起的。因此，安装转向泵时，要保证泵轴与主机同轴度误差小于0.1mm，倾斜度小于30，连接管路不要过细过长，尽量减少弯头，避免液体产生涡流。转向泵转速也不宜过高，避免损坏轴承。是什么意思？

The third reason is that the steering pump noise caused by mechanical vibration. Therefore, the steering pump is installed to ensure that the shaft with the host concentricity error is less than 0.1mm, the inclination is less than 30, the connecting pipe is not too small and too long to minimize elb