Ключевые слова: broadband, canalization, communication, conduit, connection, construction, ditch, drain, drainage, earthwork, electrician, energy, engineering building systems, equipment, fix, gravel, ground, groundwork, heating, industrial, industry, infrastructure, infrastructure development, installation, life support, lying, maintenance, municipal, pipe, pipeline, repair, sewer, sewerage, soil, technology, technology well, trench, underground, underground utilities, water, work,