Filtration process: Backwashing : 無料・フリー素材/写真
Filtration process: Backwashing / Engineering for Change
| ライセンス | クリエイティブ・コモンズ 表示-継承 2.1 |
|---|---|
| 説明 | Backwashing involves pressurizing the Lifestraw by pumping the red 'baloon' to ensure that particulates and removed from the membranes. The process takes about a minute but ensure that the Lifestraw's lifetime is extended. |
| 撮影日 | 2010-07-03 09:58:18 |
| 撮影者 | Engineering for Change |
| 撮影地 | |
| カメラ | NEX-3 , SONY |
| 露出 | 0.005 sec (1/200) |
| 開放F値 | f/4.5 |
| 焦点距離 | 22 mm |