The level of mechanical vibration during operation must be determined.
机械在工作期间振动的量级必须予以确定。
The noise and vibration level is an important index for evaluation of bearing quality.
中小型球轴承噪声水平是评定轴承质量的一个重要指标。
The noise and vibration level is an important index for evaluation of bearing quality.
中小型球轴承噪声水平是评定轴承质量的一个重要指标。
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