A flexible rubber hose used for conveying liquids, viscous fluids, and powdered solids. It consists of an inner rubber layer, multiple layers of fabric braid or yarn wrapping, and an outer rubber layer; some models feature a spiral steel wire reinforcement layer. The structure can be divided into an inner rubber layer + a middle skeletal reinforcement layer + an outer rubber layer. The fabric layers include braided layers, wrapped layers, and spiral steel wire layers, characterized by small outer diameter tolerances, oil resistance, heat resistance, and wear resistance. The minimum bursting pressure is four times the working pressure.