Yongho Choi, Kibong Han,. “Development of Falling Speed Control System for Escape Descender Using Rotary Type Orifice Oil Damper”. International Journal of Advanced Science and Technology 29, no. 1 (January 24, 2020): 1532 - 1541. Accessed April 19, 2024. http://sersc.org/journals/index.php/IJAST/article/view/3716.