Assembly in a disc brake system fitting over the disc and containing the pistons which act on the brake pads, which in turn press on the disc.

在盘式制动系统中跨刹车盘而安装的总成。包含有作用于刹车片的活塞，使刹车片能压紧到刹车盘上。

youdao

"Now it's a lot more organized." Competitors tee off from cement tee pads, working their way along a beautiful disc course that winds around cornfields, wind turbines,and a football field.

VOA: standard.2010.08.03