foam flotation

基本解释

A waist belt positioned below the flotation foam keeps the vest in place.
有一条腰带在漂浮泡沫下面的位置保持背心在适当的位置。
Objective:To find good activity surface activity dose which eliminating chromium ion in the waste water by using foam flotation method to determine the kinds of the surface activity.
前言：目的：为找到泡沫浮选法去除废水中铬离子活性较好的表面活性剂，对表面活性剂种类进行探索。
An inflatable PFD has less bulk and interference than a foam unit, but is ready to provide flotation during an unexpected entry into the water.
可膨胀的PFD有较少的体积和没有了干扰泡沫单位，但在想不到的进入水后实时提供漂浮。