Combo photo taken on Feb. 7, 2018 shows worker Wang Hui conducts flaw detection on rails at Suzhou Railway Station in Suzhou, east China's Jiangsu Province. Engineers examine the rail every night to ensure the safety of trains and passengers. (Xinhua/Ding Ting)
Engineers examine rail to ensure safety of trains and passengers
Source:Xinhua| 2018-02-07 22:06:34|Editor: Mengjie
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