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
이 건물의 구조를 강화하기 위해 보강재를 사용했습니다.I geonmul-ui gujo-reul ganghwa-hagi wihae bogangjae-reul sayonghaessseubnida.We used stiffeners to strengthen the structure of this building.