purified synthetic air (purity: ± 1 ppm C, ± 1 ppm CO, ± 400 ppm CO2, ± 0,1 ppm NO); oxygen content between 18 and 21 per cent volume,
air synthétique purifié: (pureté: ±1 ppm C, ±1 ppm CO, ±400 ppm CO2, ±0,1 ppm NO); concentration d'oxygène de 18 à 21 % en volume;