Speed system的用法和样例：
例句
- Potpourri control of the microcontroller Frequency Control System is used to thinking poor frequency control.
单片机控制的变频调速系统设计思想是用转差频率进行控制。 - The granularity of fire-resistant oil is a major index of the purity of the governing system of the large capacity turboset.
抗燃油颗粒度是表征大型汽轮发电机组调速系统洁净度的重要指标。
