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
자기풍속계는 바람의 속도를 측정하는 데 사용됩니다.jagi pung-sok-gye-neun baram-ui sokdo-reul cheugjeonghaneun de sayongdoemnida.The anemograph is used to measure the speed of the wind.