oxygen refill station 3d model

1970s industrial oxygen refill station, compact rugged machine connected to 2 large vertical pressurized gas cylinders, post-apocalyptic survival aesthetic, enclosed steel control unit with thick pipes and reinforced hoses leading into both tanks, analog gauges, pressure regulators, valves, vents and metal grilles, heavy welded construction, worn painted metal, faded blue and gray colors, dusty surfaces, chipped paint and slight rust, glowing blue indicator lights and soft cyan illuminated vents, old-world engineering mixed with retro-futuristic technology, believable oxygen processing equipment, no modern digital screens, fully enclosed internals, realistic proportions, detailed hard surface model, optimized game-ready topology under 5k vertices, centered pivot, clean UVs, PBR textures