真空充气包装贮存是通过抽真空和充入氮气来处理粮食及馆藏古籍等物品，从而保证它们在长期储藏时不易变质。
The vacuum filling gas package is used for safe-deposition such as the foodstuff and old book long time by pumping and filling in with Nitrogen.
最后给出了旋流充气气浮的污水处理装置的应用实例。
Finally, examples of the device of cyclone aeration flotation are illustrated.
应用推荐