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
계수율계는 전력 소비를 측정하는 데 사용됩니다.gyesuyul-gye-neun jeonryeok sobireul cheugjeonghaneun de sayongdoemnida.The rate meter is used to measure electricity consumption.