World's largest tower crane rolls off the assembly line

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The world's largest tower crane, the R20000-720, rolled off the assembly line in Changde City, central China's Hunan Province, on April 20. It will be used in the construction project of Chao-Ma railway bridge project of the Ma'anshan Yangtze River Bridge. It has over 60 core technology breakthroughs and achieved 10 world firsts.