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
둑의 물매턱은 비가 올 때 물이 넘치는 것을 방지합니다.duk-ui mulmaeteogeun biga ol ttae muri neomchineun geoseul bangjihamnida.The berm prevents water from overflowing when it rains.