... non-combustible,1200 °Cnon-combustible, 1600°C porcelain of will happen2.Acoustic composite board,There are natural ... , smokeless drug-free.5.The compressive, resistance to impact, structural strength.6.No bubbles, not deformation ... , the surface is smooth, easy to process.Acoustic Panel Typevolcanic lava particleAdvantageenvironmentalfireproofnon-toxicanti-radiationcharacteristicsNo ...