| 摘要 |
<p>This tank has a sewage rising zone (1a) which guides sewage supplied from a lower inlet (11a) upward, a clean water falling zone (1b) for altering the direction of flow of the sewage from the rising zone to guide it downward and discharge it from a lower outlet (11b), and a floating contaminant reservoir (S) having an upper narrow-diameter part provided partially over both zones.</p> |
