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
제강업자는 철강 산업의 중요한 역할을 합니다.jegangeopjaneun cheolgangeun sang-eob-ui jungyohan yeoghal-eul hamnida.The steelmaker plays an important role in the steel industry.