年平均径流量与汛期径流量均呈沿程递减。
Annual average runoff amount and runoff amount of flood season decreased along the river.
同时，随着螺旋角的增大，螺旋折流板换热器的壳程压力损失呈下降趋势。
Furthermore, the pressure drop in helical baffles heat exchangers gets down with the increase of helical Angle.
同时，随着螺旋角的增大，螺旋折流板换热器的壳程压力损失呈下降趋势。
Furthermore, the pressure drop in helical baffles heat exchangers gets down with the increase of helical Angle.
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