A flexible rubber hose designed for conveying liquids, viscous fluids, and powdered solids. It consists of an inner rubber layer, multiple layers of woven or twisted fabric reinforcement, and an outer rubber layer, with some models featuring a spiral steel wire reinforcement layer. The structure is divided into the inner rubber layer + intermediate skeletal reinforcement layer + outer rubber layer. The fabric layers include woven layers, twisted layers, and spiral steel wire layers. It boasts small outer diameter tolerances, oil resistance, heat resistance, and wear resistance, with a minimum bursting pressure four times the working pressure.