Properties: scarfing vertical magnetic stripe, sealing, noise performance in general. Where: datum is color steel, its noise coefficient RW = 36dB, a density of 30 kg / m; the plane is MDF or plywood, the noise factor RW = 32dB, density 24㎏ / m; datum is magnesium board, the noise factor RW = 26dB, a density of 25 kg / m; Usage: suitable partition height in the contacts between the two m ~ 4.5 m: Wang Yue new phone: 15722023064 qq: 2984226919 Address: Tianjin