格栅的运行可按设定的时间间隔运行，也可根据格栅前后水位差自动控制。

The grate will be, at intervals, performed according to the settled time or to the automatic control of pressure head between fore and after-grate.

就如同水依其水位差而流动，电流的造成就是由电位高的地方流向电位低的地方。

Just as the water level in accordance with its poor flow of current is caused by the potential flow in areas with high and low potential areas.