Lubricants, industrial oils and related products (class L). Family H (Hydraulic systems). Specifications for hydraulic fluids in categories HFAE, HFAS, HFB, HFC, HFDR and HFDU|Delivery, Mechanical properties of materials, Water content determination, Lubricating oils, Chemical composition, Volume, Hydraulic equipment, Density, Hydraulic transmission systems, Hydrostatics, Viscosity, Petroleum products, Ratings, Precision, Tensile strength, Chemical properties, Hydraulic fluids, Fire-resistant materials, Petroleum, Test specimens, Ageing (materials), Compositional tolerances, Lubricants, Reproducibility, Stability, Acid number, Industrial, Fire resistance, Hardness, Compatibility, Corrosion protection, pH, Performance, Elastomers