| 摘要 |
<p>23213 GROOVED NOZZLE IRRIGATION SPRINKLER The specification discloses an irrigation sprinkler of the impact arm type including a nozzle having a substantially cylindrical end portion having four longitudinal grooves which are shallow and are V-shaped in transverse cross-section The grooves feather or turbulate the adjacent portions of the stream, to cause along with the action of the impact arm, very uniform application of water over the entire area of sprinkling.</p> |
