Return

{
  "id": "MLC-T-IND-004819",
  "term": "Return",
  "field": "Industrial and trades",
  "definition": "The airway or passage through which used air, or return air, flows out of the mine workings after ventilating the active faces. This air has a lower oxygen content and contains contaminants such as dust, gases, and heat from equipment and blasting. A mine's ventilation system is designed with separate intake and return airways to prevent the recirculation of contaminated air.",
  "subject": "Mining and extraction",
  "translations": {
    "de": "Wetterleitung",
    "es": "retorno",
    "fr": "retour d'air"
  },
  "url": "https://mlchart.com/terminology/industrial/return/"
}