First, let's cover a few flow basics and terms.
我们首先介绍几个流基础知识和术语。
Single cover retaining screw mounted on top of the flow switch for easy access.
在流量开关上安装一个盖子固定螺丝，便以打开进入。
The presence of an ice-cover in a river will significantly change flow structure.
河道中冰盖显著改变了水流流动结构。
The presence of an ice-cover in a river will significantly change flow structure.
河道中冰盖显著改变了水流流动结构。
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