Ключевые слова: abstract, background, blue, build, circle, color, colorful, colour, construction, creative, creativity, culvert, curve, decoration, design, ditch, drain, drainage, duct, green, industrial, industry, infrastructure, maintenance, manufacturing, materials, paint, painter, palette, paper, pattern, pipe, pipeline, piping, plastic, plumber, pvc, rainbow, red, round, sewage, sewer, stack, technology, tube, tubing, water, work,