提出了针对路面条件通过控制器调节制动压力输出特性使车轮滑移率处于理想的范围，以实现防抱死制动的原理。
The anti-lock brake principle, regulating braking pressure output properties in accordance with condition of road surface so as to control the wheel slip ratio in idea scope, is put forward.
启动压力梯度使压力波传播范围变小，井底污染会造成一个附加压力降。
The spread range gets smaller because of threshold pressure gradient, and there will be a additional pressure drop in the bottom of the well because of the skin damage.
启动压力梯度使压力波传播范围变小，井底污染会造成一个附加压力降。
The spread range gets smaller because of threshold pressure gradient, and there will be a additional pressure drop in the bottom of the well because of the skin damage.
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