ការព្យាករណ៍គុណភាពខ្យល់

Note that the measurement for SO2 (sulfur dioxide) are taken from the station: Valenciennes Wallon, Nord-Pas-de-Calais and the measurement for CO (carbon monoxide) are taken from the station: FR:Nord-Pas-de-Calais/Nord/Boussières-sur-Sambre







