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
풍향계는 바람의 방향을 측정하는 기구입니다.punghyang-gye-neun baram-ui banghyang-eul cheugjeonghaneun gigu-imnida.An anemoscope is a device that measures the direction of the wind.