Culvert and horizontal pipes and spillway with hatch control need management of person specially assigned when flood is discharged.
涵、卧管和有闸门控制的溢洪道，在泄洪运行时需要专人管理；
Culvert and horizontal pipes and spillway with hatch control need management of person specially assigned when flood is discharged.
涵、卧管和有闸门控制的溢洪道，在泄洪运行时需要专人管理；
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