11. In April, coolant seeped into the primary air purification system , causing it to fail. 12. All the hot tubs are equipped with state-of-the-art purification systems . 13. The heat from the engine also can be used to fuel a water-purification system . 14. Pureit purification system is a compact drinking water treatment product suitable for household use. 15. The resulting vapor-liquid mixture then goes to a purification system . 16. Stavropol's existing water purification system had worn out, ITAR-Tass said, quoting the mayor's office. 17. Weiss wanted to show Central Americans how his water purification system could remove contaminants. 18. The Lightweight Water Purification Systems can be transported by Humvee and filters per hour. 19. A Belgian relief plane would bring water purification systems to Gisenyi on Sunday, he said. 20. About 4 . 6 million home water purification systems were shipped last year, Moes said.
