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; parts and fittings for the aforesaid goods, in particular machines chassis, tracks for crawler cranes; mixing 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; working tools; material handling apparatus of all kinds, in particular wood handling apparatus, hydraulic excavators, telescopic loaders, wheeled telescopic loaders, reach stackers; pipe layers; crawler conveyors; crusher plants; 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 crushing installations (machines); machines for handling materials, in particular gantry robots, lift belts, workpiece storage systems being parts of machines, workpiece pallet storage systems being parts of machines; 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