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
풍력계는 바람의 속도를 측정하는 데 사용됩니다.pungnyeokgye-neun baram-ui sokdoreul cheugjeonghaneun de sayongdoemnida.The anemometer is used to measure the speed of the wind.