7
Cranes and special purpose traveling cranes for steelworks; hydraulic valves
9
Control circuits for hydraulic valves
11
Electric steel plants for industrial users in the steel industry; multiple hearth furnaces; electric furnaces, namely electric arc furnaces; cooling systems for multiple hearth furnaces; heat recovery apparatus for use by industrial users in the iron and steel industries; and, incinerators and dust-extractors for the treatment of exhaust gas for use in the iron and steel industries
40
Treatment of industrial waste, such as sludge and dust, which contain metal in any form, including metal oxides, metal hydroxides and metal salts
42
Consultation services in the field of engineering in connection with plant, equipment and processes for the iron and steel industry, up and running units in the industrial and civil engineering fields, constructional steel work, boiler work and mechanical engineering; intellectual property consultation; construction consultation, namely construction drafting in the field of steel making plants; design studies relating to iron and steel processing; mechanical engineering research; technical research relating to iron and steel processing; engineering services in the fields of mechanical engineering, civil engineering fluids, electricity, automation and preparation of technical reports; design, development and maintenance of computer software for others; computer software programming for others; preparation of technical reports relating to iron and steel processing for others; metal and material testing services; preparation of design studies for the construction of buildings; and consulting services in the field engineering, particularly in the field of hydraulic systems and equipment