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Hose Structure: Hose structure is usually divided into: the inner layer, the outer layer and the skeleton layer (or intermediate layer). The tube directly receives the transmission medium wear, erosion; the outer layer to protect the body from the external environment of hose damage and erosion; skeleton layer is confined layer hose, tube gives strength and stiffness. Hose working pressure depends on the material and structure of the skeleton layer. Different skeleton layer, the common hose are: Full plastic hose (without fabric material) fabric hose (skeleton layer of fabric layer) suction hose (outer fabric layer and a layer of metal spiral for work under vacuum conditions) braided hose (skeleton layer of woven wire or fabric) winding hose (skeleton layer wire or cord winding layer, endurance is common in 80 ~ 600MPa even higher pressure) knitted hose (skeleton layer is a knitted fabric) staple fiber hose (staple fiber and rubber blend pressure is made)