It is a very important point of the appearance of flow drop pit during the process of rill erosion.
细沟侵蚀过程中水流跌坑的出现是极其重要的一环。
The system consists of a swirling chamber, two vertical buckets on its wall, a drop shaft and a water cushion pit with one blind tunnel.
本文通过模型试验研究涡室-竖井内消能系统，用内设阻涡坎的涡室连接泄洪洞和竖井，带盲洞的消力井连接竖井和导流洞。
Sewage flows through coarse bar screen and into inlet pump station drop pit, then is lifted to fine bar screen by drowned pumps.
经过粗格栅污水汇入进水泵站集水坑中，再由潜水泵提升至细格栅进水管。
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