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Workers conduct rail grinding work in Wuhu City, east China's Anhui Province, Jan. 27, 2021. Workers of China Railway Shanghai Bureau Group Co., Ltd. conduct rail grinding work early Wednesday morning to guarantee the safety of high-speed railway operations. (Xinhua/Han Xu) Workers conduct rail grinding work in Wuhu City, east China's Anhui Province, Jan. 27, 2021. Workers of China Railway Shanghai Bureau Group Co., Ltd. conduct rail grinding work early Wednesday morning to guarantee the safety of high-speed railway operations. (Xinhua/Han Xu) Workers conduct rail grinding work in Wuhu City, east China's Anhui Province, Jan. 27, 2021. Workers of China Railway Shanghai Bureau Group Co., Ltd. conduct rail grinding work early Wednesday morning to guarantee the safety of high-speed railway operations. (Xinhua/Han Xu) Workers conduct rail grinding work in Wuhu City, east China's Anhui Province, Jan. 27, 2021. Workers of China Railway Shanghai Bureau Group Co., Ltd. conduct rail grinding work early Wednesday morning to guarantee the safety of high-speed railway operations. (Xinhua/Han Xu) Workers conduct rail grinding work in Wuhu City, east China's Anhui Province, Jan. 27, 2021. Workers of China Railway Shanghai Bureau Group Co., Ltd. conduct rail grinding work early Wednesday morning to guarantee the safety of high-speed railway operations. (Xinhua/Han Xu) A worker measures a rail after the grinding work in Wuhu City, east China's Anhui Province, Jan. 27, 2021. Workers of China Railway Shanghai Bureau Group Co., Ltd. conduct rail grinding work early Wednesday morning to guarantee the safety of high-speed railway operations. (Xinhua/Han Xu) Workers gather before starting rail grinding work in Wuhu City, east China's Anhui Province, Jan. 26, 2021. Workers of China Railway Shanghai Bureau Group Co., Ltd. conduct rail grinding work early Wednesday morning to guarantee the safety of high-speed railway operations. (Xinhua/Han Xu) Workers carry rail grinding machines in Wuhu City, east China's Anhui Province, Jan. 27, 2021. Workers of China Railway Shanghai Bureau Group Co., Ltd. conduct rail grinding work early Wednesday morning to guarantee the safety of high-speed railway operations. (Xinhua/Han Xu) Workers carry a rail grinding machine in Wuhu City, east China's Anhui Province, Jan. 27, 2021. Workers of China Railway Shanghai Bureau Group Co., Ltd. conduct rail grinding work early Wednesday morning to guarantee the safety of high-speed railway operations. (Xinhua/Han Xu) Workers conduct rail grinding work in Wuhu City, east China's Anhui Province, Jan. 27, 2021. Workers of China Railway Shanghai Bureau Group Co., Ltd. conduct rail grinding work early Wednesday morning to guarantee the safety of high-speed railway operations. (Xinhua/Han Xu) A worker checks a rail after the grinding work in Wuhu City, east China's Anhui Province, Jan. 27, 2021. Workers of China Railway Shanghai Bureau Group Co., Ltd. conduct rail grinding work early Wednesday morning to guarantee the safety of high-speed railway operations. (Xinhua/Han Xu) A worker conducts rail grinding work in Wuhu City, east China's Anhui Province, Jan. 27, 2021. Workers of China Railway Shanghai Bureau Group Co., Ltd. conduct rail grinding work early Wednesday morning to guarantee the safety of high-speed railway operations. (Xinhua/Han Xu)
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