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。

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

youdao

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。

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

youdao