It is widely used in hydraulic excavators, vibratory road rollers and other construction machinery.
它广泛应用于液压挖掘机、振动压路机和其它工程机械中。
At first I kept my work papers piled on the bedroom floor and used a little computer desk on rollers.
刚开始我把文件放在卧室地板上，使用一张带滚轮的电脑桌办公。
Make use of drawers from an old dresser that's not being used. Install four rollers on an old dresser drawer, fill it up, and roll it under the bed.
利用以前旧的梳妆台的抽屉，在抽屉上安四个轴子，在里面放满东西，再把抽屉推到床底下。
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