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
배의 기울심은 안정성을 결정짓는 중요한 요소입니다.baeui giulshim-eun anjeongseong-eul gyeoljeongjitneun jungyohan yoso-imnida.The metacenter of a ship is an important factor that determines its stability.