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
기전부장님이 새로운 프로젝트에 대해 설명하셨습니다.Gijeonbujangnim-i saeroun peurojekteu-e daehae seolmyeonghasyeossseubnida.The head of the electrical department explained the new project.