一级做a免费观看大全视频,中文字幕乱码无限2019,日日麻批40分钟免费视频播放,精品专区性色av,国产性夜夜春夜夜爽,岛国三级片免费看久久,久久五月天和激情网

Robots employed in China's railway system during Spring Festival travel rush

Source: Xinhua| 2019-02-21 07:53:23|Editor: zh
Video PlayerClose

CHINA-HENAN-TRAVEL RUSH-BULLET TRAIN-MAINTENANCE-ROBOT(CN)

An engineer with China Railway Zhengzhou Group Co., Ltd operates a robot to scan and check a bullet train in Zhengzhou, central China's Henan Province, on Feb. 20, 2019. A growing number of robots are employed in China's railway system to improve efficiency and ensure safety, as railway trips are expected to hit 413 million in total during this year's Spring Festival travel rush, China's largest seasonal migration of people. (Xinhua/Li An)

   Prev 1 2 3 4 5 6 7  

KEY WORDS:
EXPLORE XINHUANET
010020070750000000000000011100001378381251


一级做a免费观看大全视频,中文字幕乱码无限2019,日日麻批40分钟免费视频播放,精品专区性色av,国产性夜夜春夜夜爽,岛国三级片免费看久久,久久五月天和激情网 国产视频观看91 国产00在线视频国产 国产综合色视频久久久 久久成人国产精品一区二区 高清无码免费黄色网站