construction, construction, supervision services, construction planning, repair and maintenance services in the fields of - industrial facilities, in the field of oil and gas, petroleum, chemical, petrochemical, mining and metallurgical; public and civil works; transportation facilities; aviation facilities; water, wastewater, hazardous waste, industrial and marine waste, solid waste, air pollution control and other environmental facilities; pulp and paper facilities; infrastructures; subterranean storage facilities; and hotel, recreational and housing facilities

feasibility study services, engineering services and engineering design services, in the field of oil and gas, petroleum, chemical, petrochemical, mining and metallurgical; public and civil works; transportation facilities; aviation facilities; space and defense facilities; nuclear facilities; water, wastewater, hazardous waste, industrial and marine waste, solid waste, air pollution control and other environmental facilities, power generation, distribution and transmission facilities; pulp and paper facilities; and hotel, recreational and housing facilities