| 摘要 |
<p>PURPOSE: To provide a device for controlling discharge of supernatant water with high reliability, capable of corresponding to a variation of the outside condition. CONSTITUTION: In the supernatant water discharge device provided with a water discharge port part in a batch-wise water tank in freely movably for a vertical direction, and also provided with a water level detection part for detecting a water level, timer relays 51-54 are used at the water level detection part.</p> |
