Dust guards were mounted above the wheels.

防尘板安装在轮子上面。

youdao

The troopers being mounted, without arms, and then with arms, in any suitable extended formation at a halt, cause them to take the various guards they have learned dismounted, using the same commands.

骑兵在马上立定，先不用刀，然后用刀，用和步下同样的口令，使骑兵进行如同步下所学的各种防卫动作。

youdao

He says Germany is behaving as a loyal ally because it has not objected to the US using its military bases in the country, and has mounted extra guards to protect those bases as the Iraq crisis has built up.

BBC: Analysis: Schroeder challenges the US