Acoustic Louver, Acoustic Door, Acoustic Enclosure manufacturer / supplier in China, offering Metal Acoustic Louvered Doors: Superior Noise Reduction for Mechanical & Electrical Areas, AS/NZS Certified, Storm Season Ready: Aluminum Sand Trap Louvers for Effective Exterior Wall Sandproof Ventilation, Sand Proof Aluminum Louvers: Protecting Ventilation Systems From Dust and Sand Infiltration and so on.