Sand also provides a firmer, less muddy surface underfoot, while aiding growth, as long as proper aeration and topdressing are part of your maintenance plan.
沙还提供了一个坚实，不泥泞的地表脚下，而协助的增长，只要适当的曝气和追肥是你的维护计划的一部分。
A novel surface aeration reactor is designed with incorporation of self-rotating flow guide (SRFG) for multiple impellers.
应用多层桨自旋导流技术，设计了一种新型自旋导流表面曝气反应器。
Alif table line-bubble aerator not only offers an high oxygenation efficiency but also can be lifted out of water surface for replacement without disturbing the operation of the aeration tank.
可提式微孔曝气装置融合了微孔曝气器及可提式曝气装置的优点，不仅氧的利用率较高，又可以在曝气池正常运行的情况下，将微孔曝气器提出水面进行检修和更换。
It's very efficient at propelling water radially, aerating and mixing the water. The invert umbrella aerator is especially suited for surface aeration oxidation ditch process.
该机径向推流能力强、充氧量高、混合搅拌效果好，特别适宜于表曝型氧化沟污水处理工艺。
The zone between the water table and the surface is called the zone of aeration.
潜水面与地表之间的地带称为饱气带。
The plants growing on the land surface can be affected by the occurrence and movement of water and salt in the aeration zone.
包气带水分、盐份的分布和运移对地表植被生长有着重要的影响。
The plants growing on the land surface can be affected by the occurrence and movement of water and salt in the aeration zone.
包气带水分、盐份的分布和运移对地表植被生长有着重要的影响。
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