润滑油变质
Lubricant change in character
油品变质
oil deterioration
deterioration of oil product
稠油油质
viscous crude oil property
变质变形
metamorphism and deformation
metamorphism-deformation
变质变形期次
metamorphic-deformation episode
变质变形作用
Metamoiphism and deformation
变质变形作用特征
Deterioration distortion function characteristic
泥质变质岩类
pelitic metamorphic rocks
有机质变质程度
degree of organic metamorphism