lockage
/ˈlɒkɪdʒ/noun
mass noun
1- the construction or use of locks on waterways船闸的建设, 船闸的使用。
1.1
- the amount of rise and fall of water levels resulting from the use of locks船闸间的水位高低度。
1.2
- money paid as a toll for the use of a lock过闸费。