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 가로대는 구조물의 안정성을 높이는 데 사용됩니다.i garodaeneun gujomul-ui anjeongseong-eul nopineun de sayongdoemnida.This crosspiece is used to enhance the stability of the structure.