SL tối thiểu: 100★ Nổi bậtTấm Chắn Ồn Cao Tốc 3.0m Hấp Thụ Âm Thanh Steel Tấm
3.0m đường cao tốc sound-absorbing noise barrier, achieving 25-35dB reduction for residential community protection. Perforated steel panel with mineral wool core; meets GB/T 19884 and EN 1793 standards.




