常見例句雙語例句Return air duct section. Single- or double-line ducts can be specified.回風(fēng)管道部分。可以指定單線管道或雙線管道。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(gè)房間回風(fēng)管的前面板上安裝有一臺(tái)一次性的非毛織品過濾器，以及一臺(tái)板式可洗粗鋁過濾器，以捕捉收集可能產(chǎn)生的任何粉塵。edctrans.com 返回 return-air duct