inlet  
noun [ C ] uk/ˈɪn.let/ us/ˈɪn.let/
  (CHANNEL)     
  水湾,小港(海、湖延伸入陆地或岛屿间的狭长水域)
a narrow strip of water that goes from a sea or lake into the land or between islands
   (MACHINE PART)      
 engineering UK specialized(机器上液体或气体的)入口,进口 
the part of a machine through which liquid or gas enters
  an inlet pipe/manifold/valve 进气管/歧管/阀