Ключевые слова: abstract, background, blue, building, circle, clean, closeup, connection, construction, design, drain, drainage, equipment, factory, home, house, industrial, industry, isolated, line, pattern, pipe, pipeline, piping, plastic explosive, plumber, plumbing, pump, pvc, repair, stack, stacking, steel, structure, supply, system, texture, tube, valve, wall, water, water pipe, work,