7 Compressors as parts of machines, motors and engines; compressed air pumps; heat exchangers being machine parts; filters, namely, magnetic air filters for vehicle motors and engines; cyclone separators; valves and cocks, in particular ball cocks being drain cocks; magnetic couplings for machines for sealing purposes or for non-contact power transmission; conveyors being machines, in particular in the form of conveying threads, for mechanical seals, in particular for cartridge sliding-ring seals; static or dynamic seal units primarily comprised of mechanical seals, intended for sliding-ring seals or supply units primarily comprised for mechanical seals for other technical installations, or supply units primarily comprised of mechanical seals with quench liquid units, thermosyphon units, seal gas units, seal pressure units, make-up devices, heat exchangers, magnetic filters or gas supply units; pressure intensifiers as parts of machines for sliding-ring seals; mechanical seals in the nature of shaft seals; single-acting and double-acting sliding-ring mechanical seals with gas or liquid lubrication for sealing liquid or gaseous media; rotary kiln mechanical seals and sealing units primarily comprised of mechanical seals; compensator aggregates and vibration decouplers being parts of machines for piping and duct systems, in particular for exhaust gas systems or for compensation of heat expansion, vibrations, movements or inaccuracies during assembly; rotary transmission units primarily comprising mechanical seals; sealing units for maritime applications primarily comprised of mechanical seals, in particular stem seals, sealing systems for bulkheads, extension devices and gear shafts; piston rings for motors or pumps; crankshaft sealing units primarily comprising mechanical seals and mechanical seals for motors; turbo charger or charge air compressor seal units being parts of machines; seal units for air conditioning compressors primarily comprising mechanical sets; mechanical apparatus and equipment for storing, pressurizing, circulating and/or tempering fluids for use in sliding-ring seals in the nature of mechanical seals; mechanical apparatus and equipment, namely, seal pressure units, fluid replenishment units, fluid circulation units, contaminant separators, leakage collection apparatus and equipment, all primarily comprising mechanical seals; gas supply devices being parts of machines for gas lubricated sliding-ring mechanical seals; all the aforesaid goods as parts of machines; magnetic couplings for sealing purposes, in particular hermetically sealed magnetic couplings for use with machines; mechanical seals and systems primarily comprising mechanical seals being parts of machines consisting thereof as parts of aircraft engines; articulated sealing systems and vibration decouplers in exhaust systems, in particular metal bellows or spring-loaded metal bellows being machines; distribution units as accessories for pumps being parts of machines