| 摘要 |
The invention concerns an absorbent, flexible cleaning unit in the shape of a right paralellepiped which is bounded at its base by a scouring surface (1), at least the end face (4, 5) forming the boundary of the parallelepiped at the rear longitudinal end is bounded on one side by a sharp edge (9) and on the other by an oblique face (11) between the side faces (2 or 3) and end face (4, 5).
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