| 摘要 |
<p>An irrigation unit comprises a spray assembly 19, a means 13 for pumping water and a means for moving the irrigation unit along a gutter 21, from which water is drawn for supplying to the spray assembly. The irrigation unit runs along rails 4 on either side of the gutter or channel 21 and may be powered by means of an internal combustion engine or by solar power.</p> |
