可变频率
VFO? Variable Frequency Oscillator? 可变频率振荡器，变频振荡器?
EAL-68 with small amount of additive is suitable for R407C in variable frequency rotary compressors of YZB-20R. EAL-68型POE润滑油加入少量添加剂可以作为R407C的YZB-20R型变频压缩机用油。
Energy consumption of variable frequency drive pump are analyzed,and makes sugg estions about its suitable application. 详细分析了变频调速水泵的能耗，对如何合理应用变频调速水泵进行了探讨。
An idea of design is provided for asynchronous m otor of variable frequency variable speed in this paper mainly. 本文主要为变频调速异步电动机的设计提供一条思路。
Motor for deflector roll in entry side is requested to use AC variable frequency control. 卷取机卸卷小车行走电机采用交流变频调速控制。
