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。
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。
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