English translation for "primary air main"

一次风管

Similar Words：

"primary air duct" English translation, "primary air fan" English translation, "primary air fan paf" English translation, "primary air fancoil system" English translation, "primary air inlet" English translation, "primary air regulator" English translation, "primary air scoop" English translation, "primary air system" English translation, "primary air-handling unit" English translation, "primary aircraft" English translation