9月7日在云南省昭通市鲁甸县江底镇拍摄的渝昆高铁江底牛栏江特大桥合龙现场(无人机照片)。
9月7日,由中铁二局承建的渝昆高铁江底牛栏江特大桥实现全桥合龙。大桥的合龙标志着桥隧占比高达87.4%的渝昆高铁建设取得关键性突破,为全线按期建成通车奠定了坚实基础。 新华社发(张广玉 摄)
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