17 Flange seals, manhole seals, ring seals, lip seals and o-rings "sealing rings" of elastomeric; sealing compounds for covering gaskets and molded parts, plastic stuffing box packings and stuffing box packing rings; non-metal sliding ring seals, in particular hydrostatic and hydrodynamic sliding ring seals, non-metal gas-lubricated sliding ring seals, elastomeric bellows-type sliding ring seals, non-metal cartridge-type sliding ring seals as well as non-metal sliding ring seals having integrated pump means for mechanical seals; magnetic coupling seals; sealing mats made of plastic or rubber for sealing pollutants out of the surrounding environment; non-metal sealing bellows, non-metal sealing sleeves, cords, bands, fabrics, meshes, felts, sheets and plates made of graphite, compressed expanded graphite, mica, compressed expanded mica, plastics, rubber, metal wires, glass, mineral or ceramic fibres, or a combination of these materials intended for manufacturing seals, packings and compensators; [ plastic material in the form of plates, fabrics and fibres, in particular aramides and polyethylene, for manufacturing soft and hard protective materials for protecting people, vehicles, aircraft and other objects against impact, stabbing, pressure waves, projectiles, and splinters; ] magnetic couplings for sealing purposes; hermetically sealing magnetic couplings; expansion joints, in particular soft material expansion joints, namely, expansion joints for connections in air pipe and flue gas pipe and duct systems to compensate for thermal expansion, vibrations and misalignments