Ключевые слова: background, build, circle, construction, copper, drain, drainage, equipment, gas, housing, improve, industrial, industry, infrastructure, maintenance, manufacturing, many, materials, metal, orange, pipe, pipeline, pipes, piping, plastic, plumber, plumbing, public, pvc, repair, replace, residential, round, service, sewer, size, stack, stacked, storage, supply, tube, tubing, water, white, work,