对油品低温泵送性能的研究表明，降凝剂具有明显改善作用；
The research on the low temperature pumpability of oil shows that the pour point depressant has the remarkable improvement;
对油品低温泵送性能的研究表明，降凝剂具有明显改善作用；
The research on the low temperature pumpability of oil shows that the pour point depressant has the remarkable improvement;
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