lockage

Based on the experience and lessons of lockage safety in Gezhouba Shiplock, the problem concerning lockage safety of multi-step shiplock were analyzed and approached.

根葛洲坝船闸船舶过闸安全的经验教训,对多级船闸船舶过闸安全问题行初步分析与探讨。

Its submerged requirement is overtopped lockage, thus submerged depth unnecessary for upstream surface over the top of inlet.

现就此行研究和探讨，供商榷。