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.
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.
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。
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