Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
가스화는 고체 연료를 기체로 변환하는 과정입니다.gaseuhwaneun goje yeonryoreul gicheuro byeonhwanhaneun gwajeongimnida.Gasification is the process of converting solid fuel into gas.