vary frequency control

• 变频控制

vary frequency control的用法和样例：

例句

1. The main pump uses frequency conversion control.
   主泵采用变频控制。
2. It will be introduced to control the frequency of Stepper Servomotor by the Way of the Interrupted Interception.
   在此介绍用中断拦截的方式实现对步进伺服电机的变频控制。