viscosity classification的意思|示意
美 / /
英 / /
黏度分级
viscosity classification相关例句
The evolution of viscosity classification of SAE J300 engine oil is explained, while main influence factors promoting the upgrading are discussed in this paper.
介绍了SAE J 300内燃机油粘度分类的沿革，阐述了促进其升级换代的主要影响因素。