| 摘要 |
<p>Appts for recovering drinking water from surface water consists of a folded, plastics container; measured amts. of treating agents, and a filter head consisting of prefilter, main filter and sepg. layer. Pref. the folds in the container are arranged vertically and purified water is discharged by application of hand pressure. The funnel-shaped water outlet is pref. shaped to fit into the opening of a water bottle.</p> |
