Ключевые слова: barriers, civil, concrete, connection, construction, development, digging, dirt, ditch, drain, drainage, energy, engineering, environment, equipment, excavation, fitting, gas, gravel, ground, heavy, industrial, industry, infrastructure, inspection, installation, maintenance, material, mechanical, metal, network, pipe, pipeline, pipes, piping, rain, repair, road, roadway, safety, sewage, sewer, sewerage, soil, structure, system, technology, transport, trench, tubing, underground, underground work, urban, utility, water, worksite,