| 摘要 |
A roller for squeezing a liquid from a sponge board into a bucket has a hollow roller body with a raised surface profile and a multitude of passage openings for the liquid. The roller spans the width of the bucket and rotates on an axle that is seated in bearings connected to the rim of the bucket. The passage openings are surrounded by raised ridges and arranged at staggered positions relative to each other. |
