科研之友
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<正>Two satellites were sent into space aboard a LM-4 B launch vehicle from the Taiyuan Satellite Launch Center at 06:25 Beijing time on April 30. The Tianhui 2 satellite was placed to a SSO orbit. This was the 303 rd launch of the LM series launch vehicle and the first mission of the Shanghai Academy of Spaceflight Technology in 2019.
