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加州水壩危機:世界築壩熱的興與衰
Tuesday, February 14, 2017 23:15
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美國加利福尼亞州北部奧羅維爾(Oroville Dam)大壩洩洪道出現決口,瀕臨崩塌,當地政府緊急疏散下游費瑟河谷地區近20萬居民,工程技術人員搶修加固洩洪道。經過洩洪疏導,周一水庫水位降到安全水平,險情得到緩解…

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