Wool felt /needle felt/needle punched felt: 1.against dust, sealing, sound insulation, thermal insulation ( A) Industrial Felt: including 112 type, 122, 132 type, 332 types of industrial felt, polishing felt special, military special items carpets, linoleum absorption, heat insulation felt, fine white felt, half-fine white felt, and a half thick white felt, colored industrial carpet, enameled ...