| 摘要 |
<p>A rotary irrigation spray device comprises a support adapted to be fixedly mounted on an irrigation riser; a spray shroud member pivotally mounted on the support; a deflector member pivotally mounted within the shroud member and pivotally displaceable within the shroud member between a pair of positions so as to define therewith an alternate pair of spray outlet paths and guide members for determining the angle of rotational displacement of the shroud member and for successively displacing the deflector member into one or other of its positions.</p> |
