Compressed air system, the system is smooth, fluid lines flammable oils, hydraulic lines, some chemical fluids, food fluids, light weight, resistance to moisture, salt water, sea water, good aging resistance, resistance to sun and light exposure, nylon tubes are typically used for hydrocarbons, aromatics, aliphatic solvents, oils, fuels and refrigerants, intolerance acids, alkalis, phenols; common transport fluid: 40 degrees carbonated soda, carbonated water 40 degrees, -20 ~ 40 degrees alcohol, distilled water, seawater, oil and the like.