短語詞組短語immersed air tube 空氣埋管immersed d tube 沉管immersed marine tube unit 海底管道組件immersed d tube tunnel 沉管隧道Immersed -tube Placement Barge 管節(jié)沉放船immersed tube tunnel 沉管隧道immersed horizontal heated tube 浸沒水平管immersed tube tunneling 沉管法 返回 immersed tube