area of culvert transect
Back filling at abutment back of Bridge or culvert
Box culvert
箱涵
箱形涵洞
箱形暗渠
盒形排水渠
盒形暗渠
盖板涵
箱形通道
方形去水渠
电压互感器
Bridge and Culvert Base
Bridge and culvert construction
bridge and culvert designs
bridge and culvert engineering
bridge and culvert hydrology
bridge and culvert jack-in
bridge culvert decoration
bridge culvert engineering