The underside of the lower roller is provided with a dust box capable of being twisted open.

在下滚筒的下面安有可旋开的灰尘盒。

youdao

Trotta's penalty was hit hard and straight, but it smashed against the underside of the crossbar and bounced back into the penalty box.

WSJ: Last-Second Soccer Magic Lifts Doncaster to Promotion

And there was almost a fairytale finish for Anelka as he latched onto a loose ball in the box, but his shot smacked the underside of the bar and bounced away to safety.

BBC: Chelsea 2-0 Tottenham

He turned and as he fell to the ground he managed to get a shot in from inside the six-yard box, but his effort came back off the underside of the bar.

BBC: Hull 1-0 West Ham