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近日，备受关注的深汕高铁又传来新进展！深汕高铁4标超大直径泥水平衡盾构机“坪山东3号”顺利始发，铁路建设进入攻坚阶段。这意味着“深圳⇌深汕30分钟”的美好愿景，正加快照进现实。深汕高铁4标位于深圳坪山