During normal operations, the flow direction of a counter-current softener used in boiler water treatment is opposite to that of regeneration.
用于锅炉水处理的逆流软化器，运行与再生时，液流方向相反。
Influence of the slopes with different directions on population regeneration was also studied, and it showed that the slope direction was one important factor for regeneration.
坡向对锐齿槲栎种群的更新有重要影响，光照好的东南坡上的更新情况明显比光照较少的西北坡好。
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