Take Golmud Lhasa product pipeline as an example, the author considers that the contaminated (?) produced from the transportation distance (?) .

• 以格拉成品油管道为例、分析了输送距离、油品的剪切速度、中间泵站、翻越点、停输和落差6种因素对成品油管道道混油产生的影响。