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
저항방사열제를 사용하여 온도를 측정할 수 있습니다.jeohangbangsayeolje-reul sayonghayeo ondo-reul cheugjeonghal su itsseumnida.You can measure the temperature using a bolometer.