| 摘要 |
<p>Counterflow rake for separating solid substances from channels and runs conducting liquid, especially from water and drainage channels canals. A rake comb is swingable in a counterflow direction to comb the rake on its guided upward travel. On its downward travel, the rake comb is swung outwardly of the rake by guide means. At the bottom of its descent, the rake swings in the counterflow direction for repeated rake combing. The means for guiding up and down travel of the comb consists of a looped passageway.</p> |
