Ключевые слова: bolts, close, closeup, connection, device, direction, engineering, equipment, flange, flow, gas, gate, industrial, industry, inner, isolator, line, material, metal, mute, off, old, open, outer, paint, pipe, pipeline, piping, pressure, repair, rough, rust, rusty, screw, screwbolt, screwing, steel, supply, support, system, tank, technical, technique, temporary, tube, tubing, valve, view, water, waterpipe, watersupply, weathered,