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
한국의 전통 가옥에서는 마루밑에 난방 시스템이 있습니다.Hanguk-ui jeontong gaok-eseoneun marubit-e nanbang sistema-i issseubnida.Traditional Korean houses have a heating system under the floor.