Brake shoe residue, sand and lubricants are often introduced by operating or maintenance processes.

在车辆运行或维护过程中也会带来闸瓦的残渣，沙砾或者润滑油脂。

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Brake shoe residue, sand and lubricants are often introduced by operating or maintenance processes.

在车辆运行或维护过程中也会带来闸瓦的残渣，沙砾或者润滑油脂。

youdao