31. The ship carries four reverse-osmosis water-purification systems , each capable of processing of fresh water per day. 32. It was a leader in the bio-instrumentation field where it made biomolecule purification systems for protein analysis. 33. This is a stretch, but some water purification systems in dental equipment may contain activated charcoal filters. 34. The purification system was a slow sand filter design that became obsolete by the late 20th century. 35. Children take water from faucets attached to a new water purification system installed by Doctors Without Borders. 36. The purification system cost about 2 . 4 billion lire ( dlrs 1 . 4 million ). 37. Chisso installed a Cyclator purification system on December 19, 1959, and opened it with a special ceremony. 38. "We've invested in an air purification system like the one they have on the Space Shuttle ." 39. "Now we will be able to compete globally in providing hi-tech water purification systems , " said Wee. 40. Since then, Yao study group has considered designing new purification systems to conserve Japanese native rosy bitterlings.
