blood viscosity increases 血液粘度升高
When crude oil pipelines shutdown, the temperature of the oil left in the line drops and the viscosity increases.
热油管道停输后，管内存油的温度下降，粘度上升。
At normal temperatures, the oil driving efficiency and the sweep efficiency of water driving are low, and the crude viscosity increases after water drive.
常温驱油效率低，水驱波及系数小，且水驱后原油黏度增加。
However, membranes tend to foul as concentrated material builds up at the membrane surface and viscosity increases, and this limits concentrations that can be obtained.
然而，浓缩物料在膜表面堆积和粘度增加使膜极易被污染，这样就限制了浓缩的进行。
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