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
고압스팀은 발전소에서 전기를 생산하는 데 사용됩니다.goapseutim-eun baljeonso-eseo jeon-gi-reul saengsan-haneun de sayongdoemnida.High-pressure steam is used to generate electricity in power plants.