Device, capital repair and reconstruction of engineering networks and systems; networks of cold and hot wa-ter supply, heat supply, the centralized sewerage of household, production and storm drains, the device of internal systems of water supply line, heating and the sewerage; Networks of power supply and device of an external electric lighting, internal systems of an electric lighting and electric heating; Networks of power supply of railway tracks, networks of power supply and electric lighting of air transport enterprises; Networks of gas supply of high and average pressure, household and production low pressure gas supply, internal gas supply systems.