42 Scientific and technological services and research and design relating thereto in the field of common metals and their alloys, metal building materials, transportable buildings of metal, materials of metal for railway tracks, non-electric cables and wires of common metal, small items of metal hardware, pipes and tubes of metal, ores, metal pipe couplings, spiral welded steel pipes, plastic-coated spiral welded steel pipes, apparatus, installations and systems for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply, sanitary purposes and hoses, tubes and pipe systems for transport of media, rubber, gutta-percha, gum, asbestos, mica, plastics in extruded form for use in further manufacturing, packing, stopping and insulating materials, flexible pipes and tubes, not of metal, non-metallic pipes and tubes, non-metallic couplings for tubes, thermoplastics in the nature of coatings for pipes, tubes and hoses; technical analysis and research services, in the field of common metals and their alloys, metal building materials, transportable buildings of metal, materials of metal for railway tracks, non-electric cables and wires of common metal, small items of metal hardware, pipes and tubes of metal, ores, metal pipe couplings, spiral welded steel pipes, plastic-coated spiral welded steel pipes, apparatus, installations and systems for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply, sanitary purposes and hoses, tubes and pipe systems for transport of media, rubber, gutta-percha, gum, asbestos, mica, plastics in extruded form for use in further manufacturing, packing, stopping and insulating materials, flexible pipes and tubes, not of metal, non-metallic pipes and tubes, nonmetallic couplings for tubes, thermoplastics in the nature of coatings for pipes, tubes and hoses; engineering and research design and development of industrial products in the field of common metals and their alloys, metal building materials, transportable buildings of metal, materials of metal for railway tracks, non-electric cables and wires of common metal, small items of metal hardware, pipes and tubes of metal, ores, metal pipe couplings, spiral welded steel pipes, plastic-coated spiral welded steel pipes, apparatus, installations and systems for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply, sanitary purposes and hoses, tubes and pipe systems for transport of media, rubber, gutta-percha, gum, asbestos, mica, plastics in extruded form for use in further manufacturing, packing, stopping and insulating materials, flexible pipes and tubes, not of metal, non-metallic pipes and tubes, non-metallic couplings for tubes, thermoplastics in the nature of coatings for pipes, tubes and hoses; evaluations, testing or technical estimates, research and reports in the scientific and technological fields and technological consultancy in the field of common metals and their alloys, metal building materials, transportable buildings of metal, materials of metal for railway tracks, non-electric cables and wires of common metal, small items of metal hardware, pipes and tubes of metal, ores, metal pipe couplings, spiral welded steel pipes, plastic-coated spiral welded steel pipes, apparatus, installations and systems for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply, sanitary purposes and hoses-, tubes- and pipe systems for transport of media, rubber, gutta-percha, gum, asbestos, mica, plastics in extruded form for use in further manufacturing, packing, stopping and insulating materials, flexible pipes and tubes, not of metal, non-metallic pipes and tubes, non-metallic couplings for tubes, thermoplastics in the nature of coatings for pipes, tubes and hoses; designing of hoses and tubes and of their parts and accessories