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
우량도법은 강수량을 측정하는 중요한 방법입니다.Uryangdobbeop-eun gangsurang-eul cheugjeonghaneun jungyohan bangbeob-imnida.Hyetography is an important method for measuring precipitation.