... . Box assembly back by the end of the carpet is divided into: asphalt, PVC, PU at the end, non-woven fabrics at the ... the environment, without any adhesive, comply with environmental requirements; 5, non-woven mat made of convex-concave bottom type, concave-convex type ... of different customers, and have artistic appreciation value. Non-woven through the pitch back at the end of the end of the general ...