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China's longest expressway shield tunnel drilled through

    Caihong Wen
    By Caihong Wen

    With a total length of 7.4 km, the tunnel project is designed to have a two-way six-lane expressway on the middle level, smoke vent on the upper level and evacuation and rescue routes on the lower level, according to the Beijing Capital Highway Development Group Co., Ltd.,

    https://english.news.cn/20230821/3c5c808e4926463a881ca8d4557a2548/c.html

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