New ventilator models are on display at the Medical Equipment and Healthcare Products Exhibition Area of the 4th China International Import Expo (CIIE) in east China's Shanghai, Nov. 8, 2021. (Xinhua/Jin Liwang)
COVID-19 control and prevention at 4th CIIE
Source: Xinhua| 2021-11-08 22:08:55|Editor: huaxia
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