中新网社会新闻: 探访大临铁路红豆山隧道：防毒面具成建设者“标配”

中新网社会新闻

探访大临铁路红豆山隧道：防毒面具成建设者"标配" Apr 19th 2019, 14:36 　　中新网临沧4月19日电 题：探访大临铁路红豆山隧道：防毒面具成建设者"标配"

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