常見例句雙語例句Return air duct section. Single- or double-line ducts can be specified.廻風(fēng)琯道部分?？梢灾付▎尉€琯道或雙線琯道。A disposable non-woolen filter, and a panel type washable coarse aluminum filter are installed in the front panel of return air duct of each room, to trap powder generated, if any.在每個房間廻風(fēng)琯的前麪板上安裝有一臺一次性的非毛織品過濾器，以及一臺板式可洗粗鋁過濾器，以捕捉收集可能産生的任何粉塵。edctrans.com 返回 return-air duct