mechanical friction meaning in Chinese

机械摩擦

Applying magnetic suspension technique to the supports of hdd ( hard disk drive ) , it have a lot of advantages in comparison with other bearing types , for example , contact free , absence of mechanical friction and wear etc . in design of hdd suspended by amb , it is one , of difficulty and emphases that active control for rotor according as the signal of displacement
将磁悬浮轴承应用于硬盘的支承，完全消除轴承与硬盘转子的机械接触，使硬盘具有其它轴承支承的硬盘无法企及的特点。在磁悬浮硬盘设计中，传感器检测的转子位移信号是控制器对轴承进行主动控制的依据，是整个系统研究的重点和难点之一。
However , the traditional dc motor uses brush so as to switch the phases , so there are relative mechanical frictions . then it comes out many fatal failing , such as yawp , spark , wireless disturb , etc . what " s more , its making cost is high , its maintain is also difficult , therefore its application is greatly limited
直流电动机具有运行效率高和调速性能好等诸多优点，但传统的直流电动机均采用电刷，以机械方法换向，因而存在相对的机械摩擦，由此带来了噪声、火花、无线电干扰以及寿命短等致命弱点，再加上制造成本高及维修困难等缺点，从而大大地限制了它的应用范围。