speed-adj ustable system的用法和樣例：
例句
- Potpourri control of the microcontroller Frequency Control System is used to thinking poor frequency control.
單片機控制的變頻調速系統設計思想是用轉差頻率進行控制。 - The granularity of fire-resistant oil is a major index of the purity of the governing system of the large capacity turboset.
抗燃油顆粒度是表徵大型汽輪發電機組調速系統潔凈度的重要指標。
