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The urban highway tunnel is a component of urban underground space development .
城市公路隧道是城市开发地下空间的组成部分。
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He is also involved in the development of the US Highway Capacity Manual.
他还参与了美国道路通行能手册的研究工作。
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He is also involved in the development of the US Highway Capacity Manual.
他还参与了美国道路通行能手册的研究工作。
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