然而随着汽车保有量的增加，带来的安全问题也越来越引起人们的注意，而制动系统则是汽车主动安全的重要系统之一。
However, with increasing of vehicle, security issues are arising from increasingly attracting attention, the braking system is one of important system of active safety.
最出名的一次是丰田公司的一家制动阀供应商于1997年毁于一场大火，而丰田公司居然在五天内就恢复了生产。
Toyota famously resumed production within five days after a fire destroyed a brake valve supplier in 1997.
它采用的是后轮鼓式制动器，而如今除了那些最低级的便宜车，多数车子的标准配备都已经使用盘式制动器了。
It has drum brakes on the rear wheels instead of the more efficient discs that are standard today on nearly every car except the cheapest bargain models.
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