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This year will be online conference-China Mining 2020 Always remember the friends we met last year. #chinaminingconference #chinamining2020 #JINSHI #jinshidrilltech #explorationdrilling #diamonddrilling #surfacedrilling #hardrockcoring #drillingtools #deepholedrilling #oremining （在 天津梅江會展中心） https://www.instagram.com/p/CGUn4nMj-hf/?igshid=1mmpl28sg9lvt
