Chua told CNN that she and Tan had taken technology and processes commonly used in air conditioning and air purifying units and adapted it for an alternative use.
Moving, assembling and testing ordnance, purifying and storing fuel, organizing the flight deck, mission planning, safely navigating the ship, preparing food, training and performing maintenance on important ship and aircraft systems go on around the clock.
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But human fecklessness is also to blame, including wastage, urban, industrial and agricultural pollution, absence of purifying systems and frequently poor democratic and financial management of the sector.
Purifying oxygen and raising steam, however, both consume energy.
Titan Resources, a firm based in Perth, Australia, believes it can manage to do both, without using any of the physical and chemical processes traditionally involved in purifying ores.
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The Chilean government has asked the United Nations for items such as field hospitals with surgical facilities, dialysis centers, generators, saltwater purifying systems, mobile bridges and field kitchens.
Sweden: Rescue Authority said it was on standby to supply water purifying equipment, health care supplies and emergency shelters if needed.
Earlier analysis had led ground controllers in Houston and Moscow to suspect a Russian air-purifying apparatus as being the source of the leak.
Purifying indoor air could cut the cost of running fans and chillers by up to 30%.
The pools were only designed to last a few years, and Tepco says it was always planning to replace them with other ways of storing or purifying the water.
It has installed 10.4 acres of purifying plants on the roof of its truck factory in Dearborn, a suburb that abuts Detroit and houses Ford's headquarters.
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