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70th Anniversary of Beijing Time---High Accurate Ground-based Time Service System (2019-12-30)
70th Anniversary of Beijing Time---Chinese Area Positioning System(CAPS) (2019-12-27)
70th Anniversary of Beijing Time---BeiDou-1 (2019-12-25)
70th Anniversary of Beijing Time---National Time Service Center (2019-12-20)
70th Anniversary of Beijing Time---Low Frequency Time-code Time Service Station (2019-12-20)
70th Anniversary of Beijing Time---Long Wave Time Service Station (2019-12-18)
70th Anniversary of Beijing Time---Atomic Time System (2019-12-13)
70th Anniversary of Beijing Time---Short-wave Time Service Station (2019-12-12)
70th Anniversary of Beijing Time---Shaanxi Astronomy Observatory (2019-12-11)
70th Anniversary of Beijing Time---Beijing Shahe astronomical workstation of National Astronomical Observatories (2019-12-05)
70th Anniversary of Beijing Time---The Establishment of Universal Time System (2019-12-05)
70th Anniversary of Beijing Time---Shanghai Astronomical Observatory (2019-11-25)
70th Anniversary of Beijing Time---Tsingtao Observatory (2019-11-25)
70th Anniversary of Beijing Time---Hong Kong Observatory (2019-11-25)
70th Anniversary of Beijing Time---Xujiahui Observatory (2019-11-25)
70th Anniversary of Beijing Time---The Birth of Beijing Time (2019-11-12)
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