Variable frequency and speed regulation的用法和樣例：
例句
- The paper introduces the method and effect of boiler fa.
文章介紹了鍋爐引風(fēng)機采用變頻調速實(shí)現爐膛負壓自動(dòng)調節的方法以及在工業(yè)運行中的效果。 - The maturing of variable frequency technology becomes an assurance for the reliable operation of a trolley type scraper.
變頻調速技術(shù)的成熟是滑線(xiàn)式鏟運機可靠工作的保證。
