Full port design produces minimum flow restriction with the lowest possible pressure - drop 全端口(全流道)结构对流体的阻力最小,因此压降也最小。
In fact , each nation participating in international trade wants to share in as much as possible gains from trade against the minimum flow of trade , namely to improve its terms of trade 其实,各个国家参与国际贸易,都是为了在同量的贸易之下,获取尽可能多的贸易利益,即改善贸易条件。