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- 08:44 21 abr 2012 (hist) (dif) N The Detailed Information About Noise Cancelling Headphones (Página creada con 'Know-how involved in sound cancellation had been made during 1950’s. It was utilized in airplanes or helicopter cockpits, yet it was not very well known until the 1970’s. Th...') (última modificación)
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