🌐EnglishEnglishDeutschEspañolFrançaisNederlandsTiếng ViệtРусскийالعربيةفارسیहिन्दीEntityQ1759095· pop 12· linked from 84 articlesair preheaterdevice to heat air in preparation for a following processConnectionsflued boilerEntityboilerEntityCategoriesChemical equipmentEngineering thermodynamicsMechanical engineeringPower station components