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
이 실험기는 새로운 기술을 테스트하는 데 사용됩니다.i silheomgineun saeroun gisul-eul teseuteuhaneun de sayongdoemnida.This experimental device is used to test new technologies.