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
검당계를 사용하여 설탕 농도를 측정할 수 있습니다.geomdang-gye-reul sayonghayeo seoltang nongdo-reul cheugjeonghal su itsseumnida.You can measure the sugar concentration using a saccharimeter.