In order to accurately calculate the meshing efficiency of the new internal S-gears. a time-varying friction model of the elastohydrodynamic lubrication is established considering the surface sliding of the gear tooth. lubricating oil condition and load. The lubrication mechanism of the meshing tooth surface is analyzed. https://www.bekindtopets.com/bargain-Taters-Over-Haters-Comfort-Colors-Adult-Ring-Spun-Cotton-Tee-best-find/