1.The launching of the 24, 000-ton tankship was contemporaneous with the completion of the new workers dormitory.
这条24000吨油轮的下水和新工人宿舍的建成是同时的。
2.Tankship carrying product oil often needs to change oil type, so it is better to wash by water .
成品油轮在营运过程中经常更换油种，为了适货就要进行水洗舱作业。