frequency-varied regulation device

• 变频调速装置

frequency-varied regulation device的用法和样例：

例句

1. The car is equipped with a speed-regulating device.
   这辆汽车配备有自动调速装置。
2. Oil pump speed regulation technology and the general principle for speed regulator slection are intro-duced.
   介绍了油泵调速调节技术和选择油泵调速装置的一般原则。