| 摘要 |
A mat for sweeping a surface, formed of grid-like, semi-flexible material. The mat is pulled over the surface to effect the sweeping. The material has open slots (112a, 112b) therethrough. The slots have a leading edge and a trailing edge disposed transversely relative to the direction of travel of the mat. Ground debris can pass upwardly through each slot, over the respective trailing edge to collect on an upper surface of the mat. Over the upper surface, the grid-like material defines an array of first apertures (136). At least a substantial proportion of the first apertures (136) have within them second apertures (146) of smaller size than the first apertures.
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