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单词 θ200915
释义
society > travel > means of travel > route or way > way, path, or track > road > parts of road > [noun] > layer beneath foundations (2)
subgrade1849

Civil Engineering. In the construction of roads and other flat load-bearing surfaces: the layer (typically the prepared natural ground) lying…

sub-base1876

Civil Engineering. A layer underneath the base layer of a road, pavement, or the like; spec. one immediately above the subgrade.

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更新时间:2024/12/24 3:02:23