42 Scientific and technological services, namely, research and design relating to the technical application and use of base metals and their alloys, pipes and fittings, clamps, valves, shut-off valves, sliding gates, couplings for pipelines, metal connectors for plugs, metal manifolds for pipelines, metal attachments for pipes of industrial installations, non-metal gaskets for tubes, hoses and pipes, and technical advice given by specialists with regard to mechanical engineering, sealing techniques, instrumentation, installation techniques and technical advice regarding the use of metal building materials, pipes and fittings, clamps, valves, shut-off valves, sliding gates, couplings for pipelines, metal connectors for plugs, metal manifolds for pipelines, metal attachments for pipes of industrial installations, non-metal gaskets for tubes, hoses and pipes; industrial research relating to the technical application and use of base metals and their alloys, pipes and fittings, clamps, valves, shut-off valves, sliding gates, couplings for pipelines, metal connectors for plugs, metal manifolds for pipelines, metal attachments for pipes of industrial installations, non-metal gaskets for tubes, hoses and pipes