Without the cleaning action of the lubricating system, carbon ring and varnish buildup would be excessive.
未经清洗行动得润滑系统，碳和清漆建设将太过分了。
Using small roller and ring friction and wear tester to evaluate the load carrying capacity of the extreme lubricating oils
利用小型环块摩擦磨损试验仪评定极压油品的承载能力
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