Ключевые слова: background, bolt, closeup, compressor, connect, connection, copyspace, dirty, engineering, equipment, fittings, flange, flanged, focus, gas, horizontal, housing, industrial, industry, iron, joint, machine, machinery, manhole, metal, metallic, nobody, nut, object, old, out, pipe, piping, plant, plate, pressure, pump, rod, rusty, screw, seal, stainless, steel, stud, system, tank, technology, thread, tube, vessel,