在安全的情况下，使汽车低速行驶，同时刹车。如果制动发出尖叫声，那么，应该更换制动片或者清洗制动器。
If it is safe, drive the car at low speed, braking as needed. The brake pads need replacing, or cleaning, if they squeal.
本文介绍用涡面元法模拟带扰流片的翼型低速无粘分离绕流。
A vortex panel method is presented to simulate low speed inviscid separated flow past an airfoil with a spoiler.
提出了抓片机构设计的基本要求，给出了一种适用于高、低速摄影的抓片机构结构的主要零部件的参数。
The structure which meets both high and low speed photography and the parameters of related key part is also depicted in this paper.
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