短語詞組短語open dredged caisson method detail 敞口挖泥沉箱法open caisson technique 沉井工藝open caisson engineering 沉井工程continuous open caisson 連續(xù)沉井super large open caisson 特大型沉井rectangular open caisson 矩形沉井sinking open caisson 沉井下沉open caisson structure 沉井構(gòu)造open caisson foundation [建]沉井基礎(chǔ) 返回 open caisson