Apparatus for recording, transmission or reproduction of sound or images; magnetic data carriers; scientific, surveying, electric, electronic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments, in particular tubes made from expansion alloys, tubes made of melt-down alloys for glass/metal or glass/ceramic/metal compounds and of iron/nickel alloys and resistance alloys, in particular for compensating elements, frames for optical lenses and expansion controllers; hollow waveguides for applications in high-frequency engineering of copper and copper alloys, invar plated with silver, precious metals and precious metal coatings; thin-wall tubes of common metals and hardenable copper/beryllium alloys, in particular for further processing into corrugated tubes and measuring springs subjected to high dynamic stresses; precision tubes of common metals, precious metals, stainless steels and special materials, in particular as guide tubes for test pins or plug-in connections; capillary tubes for measuring and control engineering, hydraulics and pneumatics of copper, copper alloys, stainless steel and special alloys; thermobimetal snap-discs and snap elements; thermobimetal ribbons and strips; stamped and moulded parts of thermobimetal, contact parts, solid and plated; contact rivets, solid and plated; stamped flexible parts of materials plated with precious metals; contact springs; contact part assemblies; riveted, tox-joined, soldered, resistance and laser-welded assemblies; deep-drawn and extruded parts for electrical engineering and electronics and for measuring and control engineering of precious metals and their alloys, copper and copper alloys, nickel and nickel alloys, stainless steels and materials with special physical properties with regard to expansion behaviour and magnetism, including with electroplated surface coatings; cold extruded parts as heat sinks; load-bearing and connecting elements for power electronics; contact parts and contact laminations for collectors; load-bearing plates and contacting plates; composite electrodes for spark plugs; protective sleeves; screening cans, caps and a number of small high-precision deep-drawn parts in special shapes of metallic materials; parts and memory elements of shape memory alloys for measuring and control engineering; plated materials with precious metal coatings and substrates of copper material, nickel and nickel alloys and steel, as ribbons, wires, tubes and profile sections; contact bimetals with coatings of precious metal and substrates of conductive copper materials and all coatable nickel materials and steels; roll seam welded ribbons and profile sections; electroplated ribbons with nickel, tin and precious metals; contact parts and assemblies with inserts and coatings of precious metal and precious metal alloys, welded, soldered, riveted, if required with electroplated coatings; contact rivets of precious metal, solid and coated; composite materials for electrical contacts as fibre and laminar composite materials; tubes as Bourdon tubes, profile tubes, tubes of plated materials, of special alloys and thin-wall, precision and capillary tubes; deep-drawn and extruded high-precision parts in special shapes of metallic materials; wires and profile sections of precious metal, solid and coated, and of special alloys and superelastic materials; all the aforesaid goods being parts of electric and electronic instruments; metal bourdon tubes; bourdon tubes; all the aforementioned products for scientific research in laboratories.

Tubes of plated materials, plated with precious metals; profile tubes of precious metals and their alloys, plated materials; tubes made from expansion alloys; tubes as melt-down alloys for glass/metal or glass/ceramic/metal compounds and of iron/nickel alloys and resistance alloys; hollow waveguides; precision tubes of precious metals and special materials; capillary tubes; thermobimetal snap-discs and snap elements; thermobimetal ribbons and strips; stamped and moulded parts of thermobimetal; metallic assemblies; thermobimetals of special materials as ribbons and strips; thermobimetal stamped and moulded parts with defined properties and assemblies of thermobimetals; roll seam welded ribbons and profile sections; electroplated ribbons with nickel and tin, silver, gold, copper, zinc, palladium and chemically nickel-plated; deep-drawn and extruded high-precision parts in special shapes of metallic materials; all the aforesaid goods being parts of vehicles and apparatus for locomotion by land, air or water.

Precious metals and their alloys and goods in precious metals or coated therewith, namely processed or semi-processed precious metals; tubes of precious metal alloys, plated with precious metals; profile tubes of precious metals and their alloys, plated materials; tubes made from expansion alloys; tubes made of melt-down alloys of precious metal for glass/metal or glass/ceramic/metal compounds and of iron/nickel alloys and resistance alloys; precision tubes made out of precious metals and alloys thereof; capillary tubes; thermobimetal snap-discs and snap elements; thermobimetal ribbons and strips; stamped and moulded parts of thermobimetal; metallic assemblies; thermobimetals made of special materials as ribbons and strips; thermobimetal stamped and moulded parts with defined properties and assemblies of thermobimetals; roll seam welded ribbons and profile sections; electroplated ribbons with nickel and tin, silver, gold, copper, zinc, palladium and chemically nickel-plated; deep-drawn and extruded high-precision parts in special shapes of metallic materials; all the aforesaid goods being semi-finished products of precious metals and their alloys or plated therewith, for use in the manufacture of jewellery, clocks and watches.

Tubes of plated materials, plated with precious metals, profile tubes of precious metals and their alloys, plated materials, precision tubes of precious metals; all the aforesaid goods being parts of writing materials and writing implements.

Treatment of metal materials for the manufacture of finished and semi-finished products.

Scientific and technological services and research, development, design and testing in the fields of finished and semi-finished products; industrial analysis and research services.