短語詞組短語rotational collective flow 轉(zhuǎn)動集體流rotational l flow 渦流;有旋流differential rotational -flow 微分旋流rotational flow desiting basin 旋流沉砂池sediment by rotational flow 旋流沉砂rotational form of flow 旋流strong rotational flow field 強(qiáng)旋流場Rotational Flow Aerator 旋流曝氣器double rotational flow 雙旋流 返回 rotational flow