a fee charged for passage through a lock in a canal or waterway
a system of locks in a canal or waterway
passage through a lock in a canal or waterway
造句
用作名詞(n.)
However, the auxiliary lock is not equipped with tow haulage equipment, so double lockage tows require special pull boat assistance. 但是，輔助船閘沒有牽引設備，因此雙閘拖輪需要有特殊的牽引船協助。