It was found that there exists a secondary flow region nearby the wall.
发现在近床壁处存在着二次流区，它与主体流区之间进行着粒子交换。
Plug the flow regulator into the wall and attach the nebulizer.
将气流调节器插头接通墙上电源，并连接喷雾器。
The reverse flow region is observable near the pipe wall.
管壁附近存在明显的回流再附区；
The reverse flow region is observable near the pipe wall.
管壁附近存在明显的回流再附区；
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