Acoustic Louver, Acoustic Door, Acoustic Enclosure manufacturer / supplier in China, offering Metal Sound Absorbing Panels Perforated Acoustic Ceiling and Acoustic Aluminium 50-100mm Thickness, Sound Attenuators for Ventilation: Duct Attenuators Engineered for Quiet Equipment Operation, Ventilation Silencers: Engineered HVAC Sound Attenuators for Quiet Equipment Operation and so on.