The so-called “aquaculture net” refers to a method by using a fixed purse seiner in a specific range of seawater to raise many aquatic animals. This method has some advantages, such as not occupying land and water resources and having high productivity per water unit.

Agricultural products pre-cooling refers to removing field heat and accumulated respiratory heat from agricultural products before transporting, refrigerating or processing so that the crops can cool down quickly. Pre-cooling should be completed within a few minutes or hours after harvesting to keep the freshness in time.