机床转速级数多、速度高，切削范围大。
Their spindle runs within a wide range of spindle speeds, thus being capable of extensive cutting operations.
在C6143型普通车床主传动系统中，由于传动比设计不够合理，致使主轴转速级数分布不均；
Due to the unreasonable design of the transmitting ratio in the major transmission system of lathe C6143, the progression of the spindle speed is asymmetrically distributed.
试验证明：温度和转速对酸岩反应的反应级数无影响。
Experiments showed that temperature and rotating rate did not affect reaction indices.
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