?单独通风

... individual trunk 专用中继线 individual vent 单独通风 individual 单独的 ...

?个别通风

... 个别训练 individual training 个别通风 individual vent 个别工作效率 individual working efficiency ...

?单独通气管

... 组合透气管 group vent 单独通气管 individual vent 曲柄箱透气管 crankcase vent pipe ...