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<正>China successfully sent the 52nd and53rd satellites of the BeiDou Navigation Satellite System (BDS) into their preset orbit with a LM-3B/Yuanzheng I launch vehicle from the Xichang Satellite Launch Center at I 5:22 Beijing time on December 16,2019.The launch marked the fact 24 MEO satellites of BDS-3 have all been sue-
