| 摘要 |
A utility surface such as an activity surface for playing a sport, for example embodied as a football pitch, consists of or comprises an element (1) having a body providing an upper surface intended for use and hover means disposed in or on the body at or adjacent an underside thereof, the hover means being constructed and arranged so that, when connected to a supply of a pressurized fluid, the hover means will create and sustain at the underside of the body a film of the said pressurized fluid, the presence and effect of such film being to raise the utility surface above an underlying support surface, and to enable the utility surface to be moved laterally across such underlying surface. The body may comprise a tray member (2), containing a filling of soil (7) in which is growing natural grass (8). The hover means may comprise a plurality of air bearing elements.
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