3月31日，中国铁建大桥局投资建造的全球最大打桩船"铁建大桥桩1"号在江苏南通交付。该船首次为大型打桩船集成动力定位与锚泊定位融合技术，同时首次在打桩船上应用主油缸闭式液压系统。该系统完全国产化设计制造，能在桩架下放或前倾时将势能转化为电能回收，能量回收率达40%，形成耗能再生良性循环，在提升效率的同时有效控制运营成本。
Amazon has a range of discounts across its Fire Stick range right now, including the Fire Stick 4K Plus. As of March 2, this model is down to just $29.99, a saving of $20 on list price. If you're familiar with Amazon's Fire Sticks, the Plus may sound new, but it's actually just a rebrand of the 4K model. Same high quality streaming device, different name.
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（博鳌聚焦）“十五五”启航：开放中国孕育新机遇
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