Spindle bearing on the stability of operation in direct influence on the processing quality, once the spindle rotation precision decrease of the machine tool use value will be low.
主轴在轴承上运转的平稳性直接影响工件的加工质量，一旦主轴的旋转精度降低，则机床的使用价值就会降低。
2
The results show that the wind stress can always create a direct gyre below it in the sea with the same direction of rotation.
结果表明，风应力的作用总可在其下方的海洋中激发出与风应力旋转方向相同的直接涡旋。
3
A direct interpolation algorithm of spiral bevel gear NC machining is proposed, thus establishing the relationship between the motion of the cutter-head center and the rotation of the work gear.