41 Educational services, namely, providing courses of instruction at the high school level; educational services, namely, conducting technical courses, technical training, technical conferences and lectures, workshops, colloquiums, conferences, congresses, seminars, symposiums and technical education competitions, all in the energy, oil and gas, steel and iron, automotive, chemical, electronic, electrical equipment, industrial engineering and technology fields; educational services and instruction services; namely, conducting technical courses, technical training, technical conferences and lectures, workshops, colloquiums, conferences, congresses, seminars, symposiums and technical education competitions in the energy, oil and gas, steel and iron, automotive, chemical, electronic, electrical equipment, industrial engineering and technology fields; educational services, namely, publication of technical books, text or articles