| 摘要 |
<p>The pouring spout includes a first tube detachably connectable to a liquid-storage container, a second tube slideably connected to the first tube, and a liquid outlet duct and an air inlet duct. The liquid outlet duct and the air inlet duct can be both selectively opened and closed by a spring-biased valve system. The air inlet duct, when the valve system is moved from a closed position to an opened position, is initially made in fluid communication with the liquid-storage container only either simultaneously with the liquid outlet duct or immediately after the liquid outlet duct is initially made in fluid communication with the liquid-storage container. This arrangement prevents the liquid from filling the air inlet duct when the liquid is poured using the pouring spout. It also minimizes evaporation and permeability of the liquid on internal surfaces inside the pouring spout.</p> |
