7 Mixing machines, in particular static mixers; Mixing machines, namely, static mixers for low-viscosity or gaseous fluids; Mixing machines, namely, static mixers for homogenising, dispersing, emulsifying and suspending fluid substances; Mixing machines, namely, static mixers for incorporating gases, gas-liquid mixtures or liquids in a gaseous stream; Mixing machines, namely, static mixers for turbulent streams; Mixing machines, namely, static mixers for flue gas purification and for flue gas purification installations; Mixing machines, namely, static mixers for mass transfer; Mixing elements, components, accessories and spare parts for the aforesaid devices, namely, pumps for mixing machines, gear drives for mixing machines, spare replacement parts for mixing machines