change-speed gearbox

• (美:transmission)变速器

change-speed gearbox的用法和样例：

例句

1. Transmission oil is used to lubricate the components in a gearbox.
   而变速器油则用来润滑变速器中的零部件。
2. Step Speed Changer and Magnetic Clutch to adjust the belt speed for stable feeding and spacing between blanks.
   采用变速器和磁性离合器调整送纸皮带速度，确保送纸及输纸步距的稳定。