n.圓形環(huán)形塔盤 disk-and-doughnut trays: 圓形環(huán)形塔盤disc-and-doughnut trays: 圓形環(huán)形塔盤disk-and-doughnut: 圓盤-圓環(huán)disk and doughnut baffle: 盤環(huán)形折流板; 圓形和環(huán)形擋板disk-and-doughnut baffles: 盤環(huán)形折流板下載手機(jī)詞典可隨時隨地查詞查翻譯