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
조속륜은 엔진의 회전력을 저장하는 데 사용됩니다.josokryun-eun enjin-ui hoejeonryeok-eul jeojanghaneun de sayongdoemnida.The flywheel is used to store the rotational energy of the engine.