37 Lubrication service and maintenance of machines, apparatus and installations for storage, preparation and transport of petroleum products; Repair services and maintenance of machines and auxiliary apparatus in the energy industry, in particular capacitors for turbines, pumps, filtration units, oil filters, and heat exchangers; Comprehensive oil change in machines and apparatus in the energy industry, chemical industry, metallurgy and mining; Cleaning and flushing, in particular hydrodynamic cleaning and flushing, of oil installations of machines and apparatus for the energy industry, chemical industry, metallurgy and mining; Cleaning, degreasing, dedusting, maintenance and anticorrosion treatment of industrial apparatus, pipelines, pumps, servomotors and reservoirs for the energy industry, chemical industry, metallurgy and mining; Cleaning of spilled petrochemical fluids, including oils and lubricants, from solid surfaces