Mixing installations of all kinds, in particular concrete mixing installations; conveyor machines for the construction industry; fixed mountable and convertible concrete pumps (machines); concrete pumps (machines) for mounting on chassis, vehicles and crawler tracks; concrete distribution booms [machines]; truck-mounted concrete pumps; stirring devices [machines]; mobile agitators; earth-moving apparatus of all kinds, in particular hydraulic excavators, rail-road excavators, wheel loaders, bulldozers, crawler loaders, cable excavators; pile driving and drilling apparatus, rotary drilling apparatus, industrial drilling apparatus; municipal vehicles, in particular excavators; machine tools; material handling machinery of all kinds, in particular wood handling apparatus, hydraulic excavators, telescopic loaders, wheeled telescopic loaders, reach stackers (cranes); pipe layers; crawler conveyors; crusher plants [machines]; cranes of all kinds, in particular tower cranes, automobile cranes, deck cranes, container cranes, mobile wharf cranes, crawler cranes, stacker cranes (reach stackers); gas and diesel engines for combined heat and power plants; machines and machine tools, in particular gear cutting machines, including gear shaping machines, roller milling machines, gear hobbing machines, and tools therefor, in particular gear cutting tools; recycling installations [machines]; machines for handling materials, in particular gantry robots, lift belts, workpiece storage systems, workpiece pallet storage systems; hydraulic and electromechanical winches; belts for conveyors; slip rings for wind turbine generators; hydraulic control units for aircraft engines and motors; parts and accessories for the aforesaid goods, in particular chassis, diesel engines, exhaust gas treatment installations, diesel-hydraulic hybrid drives, electric motors, motor and engine control apparatus, actuators, gear boxes, including pump drives, valves, cylinders and hydraulic components, equipment, including lifting gear, working tools and attachment tools, including buckets, grippers, shovels; parts and accessories for the aforesaid goods, in particular hydraulic quick-coupling systems for attachment tools, quick hitches, oscillation tools, hydraulic hammers, pipe tongs, cabins, ballast systems for cranes of all kinds, in particular for mobile cranes and crawler cranes, support systems, in particular for mobile cranes and truck-mounted concrete pumps, hydraulic quick-coupling systems for mounted tools and quick hitches