单级船闸的英文

• single lift lock
• single-lift lock

• 单级:    single stage; single level; ...
• 船闸:    navigation lock; ship lock; ...
• 坏单级船闸:    mechanical lift lock
• 机械单级船闸:    mechanical lift-lock
• 多级船闸:    flight lock; flight of locks; locks flight; multichamber lock; multiple navigation locks