词汇	caisson structure
释义	caisson structure 沉箱结构
随便看	under-ground resources underground retaining wall underground retorting underground river, subterranean river Underground river system underground road underground roads underground roadway underground roadway engineering underground rock cavern underground rock pressure underground room underground rooms of irregular shape underground root under ground root Underground roots biomass underground runoff underground run off undergrounds Underground savages underground scraper underground secondary conveyor haulage underground section electric station Underground Security Storage Association underground seepage