[Class : 7] Machines, Compressors, Piston Compressors, Dry Running And Lubricated Reciprocating Piston Compressors, In Particular Cross Head Piston Compressors, Cross Head Piston Compressors With Ring Seals, Hyper Compressors And Compressors For The High Pressure For End Pressures Of At Least 1,000 Bar And Also Parts And Spare Parts For The Named Machines; Machine Parts For The Generation, Preparation, Monitoring, Treatment, Conduction And Distribution Of Pressure Media, In Particular Of Gases And Hydraulic Liquids; Machine Parts For The Control, Regulation And Monitoring Of Pressure Media Plants And Apparatuses, In Particular Of Pneumatic And Hydraulic Plants And Apparatuses; Pneumatic And Hydraulic Valves And Cylinders, In Particular Plate Valves, Poppet Valves And Ring Valves For Compressors, Control Valves, Non Return Valves, Overload Protection Valves, Safetey Valves, Regulating Valves, Throttle Valves, Control Cylinders, Working Cylinders, Piston Rod Free Cylinders, Dampers; Filters; Condensation Separators, Lubricating Apparatus, Machine Parts For Apparatuses For The Forced Actuation Of Valves, In Particular For Apparatuses And Control Devices For The Forced Opening Of Automatic Compressor Valves; Piston Rings, Piston Rings, Piston Guide Rings, Piston Rod Seals And Scraper Rings For Reciprocating Piston Compressors.