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世界首创！列车将以350公里时速穿越海底
source link: https://tech.sina.com.cn/d/i/2020-08-04/doc-iivhvpwx9119303.shtml
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来源：中国铁路近日，汕汕铁路汕头湾海底隧道迎来“第一炮”。世界首座设计时速350公里单洞双线高铁海底隧道，正式进入实质性施工阶段。汕（头）汕（尾）铁路，将与建设中的广汕铁路相接，将广州与惠州、汕尾、汕头等城市紧密地联系在一起，同时连接厦深、
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