hydro-vac power brake

例句：

1. 1. The new hydro-vac powerbrake system is more efficient than the oldone.
   新型的水力真空制动系统比旧的更高效。
2. 2. The engineers developed ahydro-vac power brake that could reducefuel consumption by up to 30%.
   工程师们开发了一种水力真空制动器，可以降低燃油消耗高达30%。
3. 3. In heavy traffic areas, the hydro-vac power brake is often used toprevent accidents caused by sudden braking.
   在交通繁忙的区域，水力真空制动器常被用来防止因突然刹车引起的事故。