| 摘要 |
<p>The displacement system is for the optimization of an improved separated drainage installation, involving floats, check valves (K1) and water levels through precipitation and through the working of the drainage pump. In a large measure, feed of rain water (rwa) is restricted to the receiving drainage installation (B) and the drainage water purification installation, with regard to the quantity of rain water involved. The system is suitable for a combined rain water-drainage well. It can function without floats, but provided with a mechanical, electronic regulation arrangement.</p> |
