... it consists of inner layer, fiber heat insulation, cover layer, anti-wear rubber strip. It has ... is made of inner layer, fiber heat resistance, cover layer, metal spire, and anti-wear strip. ... age-resistance, heat resistance and cold resistance, etc.. Heat insulation: it is made of terylene ... resistance, anti-friction, no agglomerate, no powder, etc.. Cover it is made by coating nylon with PVC or ...