雷诺润滑方程
Reynolds lubricating equation
雷诺润滑方程式
Reynolds lubrication equation
冷却润滑
Cooling and Lubrication
roll cooling and lubricating
冷却润滑乳液
coolant lubricant emulsion
冷却润滑效果佳
good colling and lubricating effect
离合器润滑安全阀
clutch lubrication relief valve