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https://en.jzyjspace.com/news/46.html Kyushu Yunjian | Longyun Liquid Oxygen-Methane Engine Completes Series of Reliability Hot... Recently, the Longyun liquid oxygen-methane engine developed by Jiuzhou Yunjian successfully completed a series of reliability hot-fire tests. As of now, the... liquid oxygenkyushuyunjianlongyunmethane