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
유도코일은 전자기 유도 원리를 이용하여 전기를 생성합니다.yudokoil-eun jeonjagi yudo wonlireul ilyohayeo jeonggireul saengseonghamnida.The induction coil generates electricity using the principle of electromagnetic induction.