Nitrous oxide bypass double-arm gas ramp CADUCEUS with mechanical arm changeover (2 arms of 8 cylinders) Gas ramp CADUCEUS double-shoulder bypass for oxygen with mechanical arm changeover (2 arms with 4 cylinders) Nitrous oxide bypass double-shoulder CADUCEUS gas ramp with automatic arm changeover (2 arms of 17 cylinders) Gas ramp CADUCEUS double-shoulder by-pass for oxygen with automatic switching of arms (2 arms for 1 cylinder), exec. CADUCEUS single arm nitrous oxide gas discharge ramp (1 arm for 7 cylinders) Nitrous oxide bypass double-arm gas ramp CADUCEUS with mechanical arm changeover (2 arms of 18 cylinders) Gas ramp CADUCEUS double-shoulder bypass ramp for carbon dioxide with mechanical switching of arms (2 arms for 2 cylinders). CADUCEUS single arm gas discharge ramp for oxygen (1 arm for 3 cylinders) Gas ramp CADUCEUS double-shoulder bypass for nitrous oxide with automatic arm changeover (2 arms of 11 cylinders) CADUCEUS single arm gas discharge ramp for oxygen (1 arm for 2 cylinders) Gas ramp CADUCEUS double-shoulder bypass for nitrous oxide with mechanical arm changeover (2 arms of 9 cylinders) Nitrous oxide bypass double-arm CADUCEUS gas ramp with automatic arm changeover (2 arms of 18 cylinders) Gas ramp CADUCEUS double-shoulder bypass ramp for carbon dioxide with automatic switching of arms (2 arms for 3 cylinders) Nitrous oxide bypass double-arm gas ramp CADUCEUS with automatic arm switching (2 arms of 7 cylinders) Gas ramp CADUCEUS double-shoulder overflow ramp for oxygen with automatic switching of arms (2 arms for 10 cylinders) CADUCEUS single-shoulder gas discharge ramp for oxygen (1 arm for 6 cylinders), cabinet version Gas ramp CADUCEUS double-shoulder overflow ramp for oxygen with automatic arm changeover (2 arms of 8 cylinders) Gas ramp CADUCEUS double-shoulder bypass ramp for oxygen with mechanical arm changeover (2 arms of 7 cylinders) CADUCEUS single arm nitrous oxide gas discharge ramp (1 arm for 9 cylinders) Nitrous oxide bypass double-arm gas ramp CADUCEUS with mechanical arm changeover (2 arms with 4 cylinders) Nitrous oxide bypass double-shoulder CADUCEUS gas ramp with automatic arm changeover (2 arms with 5 cylinders) CADUCEUS gas ramp double-shoulder bypass for nitrous oxide with automatic arm changeover (2 arms of 15 cylinders) Gas ramp CADUCEUS double-shoulder overflow ramp for oxygen with automatic arm switching (2 arms with 4 cylinders) Gas ramp CADUCEUS double-shoulder overflow ramp for oxygen with automatic switching of arms (2 arms for 2 cylinders) Gas ramp CADUCEUS double-shoulder overflow ramp for oxygen with automatic switching of arms (2 arms with 3 cylinders), exec. CADUCEUS single arm gas discharge ramp for oxygen (1 arm for 8 cylinders), cabinet version