... .soft surface 3.high efficient noise insulation wave noise absorbing sponge effect is good, function FR,Rohs,svhc Uses ... according to customer requirementsSizeProduction according to customer drawings featureSound-absorbing effect is good, functionFR,Rohs,svhcUsesNoise reductionIndustry StandardGB,BS ... into it, it can cause gaps in the air vibration; the viscous drag due to air friction and pore ...