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离题万里
Re: 湖南大桥建成六年桥墩如遭"虫蛀" 斥资8千万
by
somebody12
on
18/10/2016, 06:02:37 UTC
混凝土质量问题,具体点应该是原材料砂石的含泥量问题,抗腐蚀性差