Ключевые слова: build, business, close, concept, construction, design, distribution, drain, drainage, element, faucet, fitting, gas, gas tap closed, gutter, home, icon, illustration, industrial, isolated, line art, m3, metal, oil, open, pipe, pipeline, pipelines, piping, plastic, plumber, plumbing, pump, repair, sanitary, sewer, sign, stem, symbol, tap, tube, valve, valves, waste water, water, web,