cc523pate 发表于 2018-1-22 19:57:52

DIN 51350-3-2010 Testing of lubricants -- Testing in the four-ball tester

DIN 51350-3-2010 Testing of lubricants -- Testing in the four-ball tester -- Part 3: Determination of wearing characteristics of liquid lubricants



admin 发表于 2018-1-23 20:17:43


谢谢您的分享，金币已奖励!
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