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
극돌기를 할 때는 안전 장비를 착용해야 합니다.geukdolgireul hal ttaeneun anjeon jangbireul chak-yonghaeya hamnida.You must wear safety equipment when performing extreme rotation.