Ключевые слова: color image, connection, construction, construction industry, damage, development, digging, dirt, district, drainage, engineering, equipment, excavation, expertise, flowing, ground, grunge, heavy, industrial, industry, infrastructure, inspection, installation, installing, material, metal, network, pipe, pipe tube, pipeline, repair, repairing, safety, sewage, social issues, steel, system, technology, trench, tube, underground, utility, water, working,