1月13日,我国自主研制的世界最大直径竖井掘进机“启明号”正式始发,投入崇太长江隧道2号竖井建设,开创了我国高速铁路竖井采用掘进机施工的新纪元,也为迎接已突破万米掘进大关的“领航号”盾构机“归队”奠定了坚实基础。(新华社)
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