Ключевые слова: background, block, bolt, closeup, connect, connection, construction, design, engineering, equipment, facility, flange, gas, gasoline, gray, hardware, horizontal, industrial, industry, iron, joint, manufacturing, metal, metallic, nobody, nut, object, old, part, pipe, pipeline, piping, plant, pressure, rusty, screw, shiny, stainless, steel, stud, supply, system, technology, thread, togetherness, tool, tube, valve, vessel, work,