内容摘要：国庆中秋假期是团圆时刻，但也有不少人依旧坚守岗位，守护着千家万户的团圆。在平均海拔4500米的青藏铁路格尔木至拉萨段上，西宁工务机械段的职工们假日不停工，加紧推进机械化清筛施工，保障假期高原铁路的安全

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