submerged stage的意思|示意

Currently, the hydraulic performance of the submerged pump system at home and abroad is still lack in-depth understood, and its optimum hydraulic design research is still in primary stage.

目前国内外对潜水泵装置的水力性能还缺乏深入了解，潜水泵装置优化水力设计的研究仍处于起步阶段。

The results of the operation showed that the two-stage, submerged membrane bioreactor helped the growth of the energy-rich worms and reduced the yield of sludge.

运行结果显示，二段淹没式膜生物反应器能够增强高能级生物体蠕虫生长与少产污泥的目的。