Acoustic Louver, Acoustic Door, Acoustic Enclosure manufacturer / supplier in China, offering Tailor-Made Sand Trap Aluminum Louvers– Conforming to European or American Standards, Tailored Aluminium Acoustic Louvers for Ventilation and Noise Reduction, Rainproof Louver Superior Aluminum Weather-Resistant Louver for Efficient Ventilation and Rainproof Protection and so on.