7 Machines and machine elements for mechanical process engineering, and installations comprising the aforesaid goods; machines and machine elements for mixing materials, in particular batch mixers, continuous mixers, ring layer mixers, conical mixers, mixers with single-sided bearings, cylinder mixers, horizontal mixers, vertical mixers; machines and machine elements for conditioning materials, namely, for homogenizing, extracting, wetting, palletising, coating and recycling, included in this class; all the aforesaid goods for use in industrial applications, in particular in the fields of building materials, chemistry, renewable energies, power plant technology, plastics and elastomers, foodstuffs, metallurgy, pharmacy, steel mills and foundries, environmental technology, and for processing piece goods and bulk goods, in particular plastics and plastic admixtures, wood, waste wood, paper, cardboard, cellulose, textiles, waste, gum, rubber, resins, leather, foodstuffs, natural stimulants and foodstuffs for animals, minerals, pigments, dyestuffs, pharmaceuticals, agricultural chemicals, dry mortar, cement mixes, metals, metal powders, composite materials, special waste, sludge, substitute fuel, ashes, dusts, bin-fuels; spare parts and accessories for the aforesaid goods, included in this class, in particular drives, helical agitators, mixers, cutter heads, lifting columns, containers, centrifuges, chopper, central pipes being machine parts, filter systems, vapour precipitators, discharge valves, ball segment valves, flat side valves, seals, multiple-lip seals, sliding ring seals, linings, inspection/cleaning hatches, samplers, vacuum systems, condensation systems, dosing systems, conveyor systems, individual or plant control