Tests in laboratory and industry have shown that ball_milling with variable rotational speed can raise the efficiency of ball_milling by a big margin and improve the processing quality of the powders.
实验室和工业应用试验结果表明，变转速球磨方法不仅能较大幅度地提高球磨效率，而且能对粉料加工质量产生明显的影响。
The results also show that the performance of variable working condition of hybrid system can be improved by changing the rotational speed of gas turbine.
研究结果还表明，由于供给燃料发生变化而引起的燃气轮机转速的改变，有利于改善混合动力系统的变工况性能。
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