Ключевые слова: bend, conduit, connection, construction, corner, coupling, design, detail, drain, draw, drawing, element, engineering, fitting, flat, graphic, hand drawn, icon, illustration, industrial, industry, isolated, lavatory, line, linear, metal, minimal, outline, pieces, pipe, pipeline, plumbery, plumbing, pressure, pump, sink, stream, supply, system, tap, tube, tubes, valve, washbasin, water,