In this photo released by Xinhua News Agency, a worker inspects the operation of a 3D printer at the additive manufacturing research and application center of the Hunan Vanguard Group Co., Ltd. in the economic development zone of Changsha city in central China's Hunan Province, on Tuesday, Feb. 11, 2020. The company has been producing goggles for medical use with more than 50 3D printers working day and night for use in hospital fighting the novel coronavirus outbreak. (Xue Yuge/Xinhua via AP)
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