翻译下!~~~~谢谢? he reactor is constructed of five 20 foot lengths of ½ inch outside diameter (o.d.) tube, three lengths of 20 foot ¾ inch o.d. tube and two lengths of 1 inch o.d. tube. 这个反应器是由5个外径1/2英寸,长度20英尺的管子、3个外径3/4英寸,20英尺长度的管子和2个外径1英寸(长度20英尺)的管子建造的.查看更多