... Group, air force, navy. The product has advatages of light in weight, flexible, durable and no-leakage. It has tested by Shaanxi ... inner layer, fiber heat insulation, cover layer, anti-wear rubber strip. It has advantages of lightweight, soft, no-leakage, and small ... , fiber heat resistance, cover layer, metal spire, and anti-wear strip. It is applicable under bent state condition. 2> Nominal inside ...