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涵洞
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涵洞
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涵洞
横贯并埋设在路堤中的供排泄洪水、灌溉或交通使用的渠道或管道。但多跨桥梁的跨总长小于8米,或单孔跨度小于5米者,也称涵洞。
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-summable series 「C,
Summa Contra Gentiles
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Summarization of Materia Medica
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Summarized Records of Poems and Poets from Guizhou
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Summary of Annual Events from Jianyan Period
Summary of Chinese Ancient Rare Books
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