Viscosity index An arbitary scale used to show the relativemagnitude Of viscosity changes with temperature.
粘度指数表明粘度随温度变化相对程度的经验量值。
But along with the reaction, the viscosity of acid increased in the surface of rock, while a large scale of decline of reaction rates by contrast.
但随着反应时间的增加，在岩石表面处酸液黏度增加，使得反应速率出现较大幅度的下降。
The acoustic field can prevent and remove the scale, lower the viscosity of oil, enhance the seepage flow velocity.
声场还可以使出油井防垢、除垢，降低原油粘度，提高其渗流速度。
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