The paper also sets up a new concept of bottom air column effect and discusses the action mechanism of bottom air column effect.
文中提出了底部空气柱效应新概念，探讨了底部空气柱效应的作用机理。
The paper also sets up a new concept of bottom air column effect and discusses the action mechanism of bottom air column effect.
文中提出了底部空气柱效应新概念，探讨了底部空气柱效应的作用机理。
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