摘要 |
<p>The watering system consists of a tubular reservoir (7) with an aperture at the top closed by a lever plug (2), and an inclined pipe (15) attached to an elbow bend (13) at the lower end of the reservoir to deliver water to a master tray (1) with an outlet (17) that feeds secondary trays (18). A rubber ring (16) with an eccentric hole on the lower end of the pipe controls the level of the water in the master tray.</p> |