42 INDUSTRIAL QUALITY CONTROL SERVICES, INVOLVING THE BUILDING OF MERCHANT VESSELS, STATIONARY POWER PLANTS, HYDRO-ELECTRIC INSTALLATIONS, OIL REFINERIES, CHEMICAL AND GAS PLANTS, PIPELINES AND REFRIGERATION PLANTS, AS WELL AS ENGINEERING CONSULTATION AND TECHNICAL EVALUATION, ANALYZATION, TESTING AND DESIGNING SERVICES RELATING TO THE INDUSTRIAL QUALITY CONTROL SERVICES