The testing report of our new airtight window YE-219 issued by NCKU was released its soundproof level was approved as Rw 36db.
Report link:
鋁擠型(工業、建材、傢飾) 鋁門窗 鋁帷板牆 鋁天棚 鋁百葉 鋁格柵 太陽能鋁製品 捷運月台門