... ,develope and improve it for raising the production efficiency.colour wool felt techique use:1.used in mechanism,electronechanical, ... retardant,insulation5.filtration:air,petroleum,water6.polishing:marble,crystal,glass,jadeware,furniture,stainless steel plate 2.seal,dustproof,cushion, ... ,insulation5.filtration:air,petroleum,water6.polishing:marble,crystal,glass,jadeware,furniture,stainless steel plate