| 摘要 |
<p>Excessive oil contamination creates difficulties for water entering waterways. The invention reduces these difficulties by causing the water to flow through three passages on its way to the inlet, the first passage comprising an oil barrier having a net stretching from the surface of the water, preferably down to the bottom of the waterway, the second comprising a filter cloth with a mesh size between 0.2 and 2 mm2 and the third comprising a filter formed of particles with closed cells which have been perforated. </p> |
