21. He said a Belgian relief plane would bring water purification systems to Gisenyi on Sunday. 22. Among the parts that they have scored are parts desperately needed for the purification system . 23. That meant that the cooling system and the primary breathing air purification systems were operating. 24. Fittings such as air purification systems , showers, gas proof doors, telephones, periscopes and wiring were standardised. 25. The United Arab Emirates, for example, is contributing a water purification system for Baghdad, he said. 26. There is also evidence of water purification systems . 27. Urgent investment is also needed in the country's water treatment and purification systems , the agency said. 28. I have an air-purification system in my house. 29. How to deal with its clogged purification system ? 30. Management soon cleaned the factory's bathrooms, installed a water-purification system and increased overtime pay, Reyes says.
