culvertn.涵洞;阴沟;地下电缆管道;涵洞桥
culvert crack廊道裂缝
culvert bridge涵式桥
culvert tunnel暗涵隧道
culvert outlet涵洞出水口
Culvert sluice涵闸
culvert design涵洞设计
culvert length涵长
culvert outflow涵洞出流
culvert section涵洞断面
culvert jacking顶人设涵