9 Apparatus for recording, transmission or reproduction of sound or images; blank magnetic data carriers; scientific, surveying, electric, electronic, optical, weighing, measuring, signalling, checking, life-saving and teaching apparatus and instruments, composed of tubes made from expansion alloys, tubes of melt-down alloys of glass/metal or glass/ceramic/metal compounds and of iron/nickel alloys and resistance alloys, in particular for use as compensating elements, frames for optical lenses and expansion controllers, hollow metallic waveguides for applications in high-frequency engineering of copper and copper alloys composed of invar plated with silver, precious metals and precious metal coatings, thin-wall tubes of common metals and heat-treatable copper/beryllium alloys, corrugated tubes and measuring springs subjected to high dynamic stresses, precision tubes of common metals, precious metals, stainless steels and special alloys being guide tubes for test pins and plug-in connections, capillary tubes for measuring and control engineering, hydraulic and pneumatic tubes 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, electric contact component parts in solid state and/or metal plated, solid and plated contact rivets, flexible parts of electric contact components plated with precious metals, electric contact springs, parts for electric 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, electric contact parts and contact laminations for collectors, load-bearing plates and contacting plates, composite electrodes for spark plugs, protective sleeves, screening cans, caps and 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, electric contact components of 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; electric contacts being electroplated ribbons with nickel, tin and precious metals; electric contact parts and assemblies with inserts and coatings of precious metal and precious metal alloys being welded, soldered, or riveted with electroplated coatings, solid and coated contact rivets of precious metal, 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 solid and coated precious metal and of special alloys and superelastic materials
Trademark: 79178340
