used to control fluid flow (as in the air inlet of a carburetor)
air inlet cam
[机] 进气口凸轮
air inlet silencer
[机] 进气口消音器
air inlet valve
[化] 进气阀; 空气进口阀
combustion air inlet
[建] 燃烧层空气的入口
fresh air inlet
[化] 新鲜空气入口; 送风机进口