viscosity law粘度法则viscosityn.粘度；粘性viscosity-temperature properties黏温性能viscosity-temperature dependency粘-温关系viscosity average molecular weight粘均分子量viscosity-shear rate relationship粘度.；剪切速率关系曲线viscosity-temperature coefficient粘温系数viscosity-average molecular weight粘度平均分子量viscosity-molecular weight equation粘度-分子量方程viscosity-temperature characteristic粘温特性viscosity - average molecular weight粘均分子量viscosity -- pressure relationship黏压效应