本文根据实践与测试认为，供水管井过滤器直径、长度的确定，按“入井流速”计算不合理。
It is deemed that choice of well screen 's diameter and length of a water well according to the inflow velocity to the well as did by some professional agencies traditionally is not reasonable.
需要用它来对井、沙过滤器、抽水机以及管输水系统进行消毒。
It will be required to disinfect Wells, sand filters, pumps, and piped water systems.
简述了用于核电凝汽器热井中的磁栅除铁过滤器的作用、结构、技术特点、布置方式等内容，并对相关技术问题进行了分析和论证。
Attempts have been made to solve this problem by steering the cathode spots by a magnetic field, and by removing the droplets by a magnetic filter.
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