Vibration dampers being parts of machines; Vibration dampers being parts of engines; Shock absorbers being parts of machines; Machines and machine tools for treatment of materials and for manufacturing; Actuators for dampers; Dampers being parts of machines; Sound absorbers being parts of machines; Shock absorber plungers being parts of machines; Piston rods; Hydraulic accumulators; Power driven buffers; Torsion dampers for machines; Hydraulic actuators; Vibration motors; Hydro-pneumatic accumulators; Vibrating separators being parts of machines; Anti-vibration mountings for machines; Hydraulic circuits for machines; Dashpot plungers being parts of engines or motors; Sound absorbers being parts of exhaust systems for machines; Shock absorbing springs being parts of machine suspension; Pistons for engines; Silencers for engines; Damping rollers being parts of machines; Machines and parts of machines, namely vibration dampers and shock absorbers for machines, engines and drives; vibration dampers using highly viscous fluids for vibration isolation of machines; vibration dampers using highly viscous fluids for vibration damping of machines in combination with air springs