对于超高速切削机床来说，比较理想的主轴承是空气轴承和磁力轴承。
For high speed cutting machine tools, the main bearing is the ideal air bearings and magnetic bearings.
采用超高速磨削，对改善磨粒的切削状态，降低比磨削能是非常有利的。
The ultra high speed grinding mode may improve the cutting conditions of the grains and thus reduce the specific grinding energy.
采用超高速磨削，对改善磨粒的切削状态，降低比磨削能是非常有利的。
The ultra high speed grinding mode may improve the cutting condition of the grains and thus reduce the specific grinding energy.
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