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价值几千万设备不再一去不复返,盾构机海底弃壳求生
source link: https://tech.sina.com.cn/d/i/2018-08-22/doc-ihhzsnea7993652.shtml
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来源：科技日报地铁隧道，大多是盾构机挖出来的；但这种机器不能回头和倒退。打海底隧道的盾构机，往往一去不复返。厦门地铁3号线海底隧道中，中国工程人员想了个办法，让海底的盾构机第一次倒退返回。盾构机是打洞能手，就像贪吃蛇在土层里掘进。它的头，是
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