https://www.techlearning.com/news/magnet-school-updates-sound-system
Magnet school updates sound system | Tech & Learning
Dec 6, 2010 - The North Carolina School of Science and Mathematics (NCSSM) in Durham called upon North State Sound to design and install a new state-of-the-art sound system.
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https://www.techdigest.tv/2007/11/ozone_inflatabl.html
Ozone Inflatable Neutron - with built-in sound system - Tech Digest
Dec 18, 2015 - Whether you have a pool or you are planning for next year's summer break - the Ozone Inflatable Neutron could be a luxurious way to relax.
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