| 摘要 |
<p>The sluices are of flexible material, stiffened by horizontal bars encased in it to prevent corrosion. Pressure of water against the dike wall normally holds them shut, but pressure in the opposite direction forces them open. To allow water to flow out of the dike, a rope attached to the bottom of each sluice is hauled upwards, causing it to fold away from the conduit mouth. The valves in the normal stationary position are inclined against the dike wall. The valves lateral edges contact guide channels which prevents the valve surface from being subjected to lateral currents.</p> |
