人妻无码全彩里番ACG视频,97亚洲自拍另类欧美综合,狠狠爱无码一区二区三区,国产超碰a男人的天堂,交+视频+在线观看视频,香蕉eeww99国产精选,天堂А√中文最新版地址在线,麻麻熟睡让我滑进去了

● Using a tapered roller bearing test machine, under the test conditions similar to the gearbox, the lubricating oil is subjected to mechanical shear stress, resulting in permanent viscosity loss, and according to the rate of decline of kinematic viscosity before and after the test lubricant test. Indicates the viscosity shear stability of the lubricating oil.

● Test method

◇ NB/SH/T 0845-2010

Determination of viscosity and shear stability of transmission lubricants - Tapered roller bearing test method

◇ CEC L-45-A-99

Viscosity Shear Stability of Transmission Lubricants

DIN DIN 51350-6

Testing of the Shell four-ball tester - Part 6: Determination of shear stability of lubricating oils containing polymers