Ключевые слова: aluminum, armature, background, bolt, connection, construction, engineering, equipment, factory, flange, flanged, flow, hardware, heavy, huge, industrial, industry, iron, joint, large, macro, manufacturing, metal, metallic, nobody, nut, object, oil, part, pipe, pipeline, piping, pressure, round, screw, screwed, shiny, silver, stainless, steel, technology, tube, vacuum,