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
활차 모양의 구조는 뼈의 움직임에 중요한 역할을 합니다.hwalcha moyang-ui gujo-neun ppyeo-ui umjigim-e jungyohan yeoghal-eul hamnida.The trochlear structure plays an important role in the movement of bones.