7 Motors and engines, except for land vehicles, internal combustion engines, machine coupling and transmission components, except for land vehicles, and parts and spare parts therefor; motors and engines for ships, namely, ship propelling systems, for on-board power generation and for fixed power plants, primarily comprised of propeller, shaft and gearbox; 2-stroke and 4-stroke diesel engines, 4-stroke diesel-gas and gas-otto engines and parts therefor, in particular fuel-mixing devices, shafts, gears, couplings for machines; engines for boats; current generators; hand tools, other than hand-operated, for the maintenance of motors and engines; land-based and floating electricity generators for generating direct current or alternating current, predominantly consisting of combustion engines, other than for land vehicles; exhaust gas turbochargers and turbines, except for land vehicles, and parts therefor; diesel-gas engines for land-based and floating power stations; compressors, turbines, turbomachines, turbogenerator installations and generators for generating electricity, namely, axial compressors, radial compressors, process gas turbines, axial expanders, radial expanders, transmission expanders; machine units comprising the aforesaid turbines and compressors; process gas screw compressors; screw expanders, multi-shaft compressors, transmission compressors, industrial steam turbines, industrial gas turbines, other than turbines for land vehicles; compressors consisting of integrated electric motors with compressors and frequency converters; energy generating machines and heat production installations, namely, gas and combined cycle power plants, steam power plants; fitted thermal protection housings for the aforesaid compressors, turbines, turbogenerator installations and generators, consisting of insulating linings; fitted sound insulation housings for the aforesaid compressors, turbines, turbogenerator installations and generators, consisting of damping linings; fitted basic housings for the aforesaid compressors, turbines, and turbomachines; gear boxes, in particular industrial gear boxes, except for land vehicles, for cement installations and petrochemical installations, for the plastics and steel industry, for wind energy installations; spur gears and epicyclic gears for turbo engines; marine transmissions with diesel engine and/or turbine drives; sliding bearings, in particular for electric machines, blowers, compactors, pumps, ships; machines and mechanical equipment and apparatus, and installations constructed therefrom, for use in the chemical industry; hydrotreaters, namely, machines for pre-treating liquid media; machines and mechanical equipment and apparatus, and installations composed thereof, for exothermic and/or endothermic processes, in particular gas phase processes; machines and mechanical equipment and apparatus, and installations composed thereof, for the chemical and refinery sector, namely, reactor systems for catalytic gas phase reactions; hydrotreaters; machines and mechanical equipment and apparatus, and installations composed thereof, for research purposes in the field of catalytic gas phase reactions and acid production; machines and mechanical equipment and apparatus, and installations composed thereof, for generating ultra-high vacuum; machines and mechanical equipment and apparatus, and installations composed thereof, for nuclear technology; machines and mechanical equipment and apparatus, and installations composed thereof, for accelerating nuclear particles; solar, hybrid and geothermal power plants composed of the aforesaid compressors, turbines, turbogenerator installations and generators for generating electricity, gas tank installations; electrical monitoring apparatus and instruments and monitoring equipment composed thereof for compressors, turbines, turbo machines, turbo generator installations and generators and for installations for generating energy