On top of cooked flavors, the expansion and contraction of the liquid inside the bottle might push the cork out or cause seepage.
葡萄酒体积在瓶内的膨胀或收缩，除了会使葡萄酒的口味过熟外，还可能把软木塞挤出，造成空气渗入。
Moreover this gradual contraction inlet may translate some pressure energy of liquid into kinetic energy and increase circumrotate speed. These play active actions on improving separation efficiency.
同时这种渐缩式入口方式，可将来液的一部分压能逐渐转化为动能，提高了旋流速度，对提高分离效率起到积极作用；
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