将从减压渣油制取的基础油称为光亮油，BS是光亮油（Bright Stock）的英文字头。每类光亮油也按其粘度分为若干牌号，其牌号中是数字表示的是该基础油在200F时的赛氏通用粘度秒数（SUS）的大约值。
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The yield of bright stock is 16. 38%, and its characteristics are high solidifying point, low viscosity and high CP %.
光亮油原料收率为16.38%，其凝点较高，粘度较小，结构族组成中的烷基碳率较高。
Bright stock Refined, high viscosity lubricating oil usually made residual stocks by suitable treatment, such as a combination of acid treatment or solvent extraction with dewaxing or clay finishing.
加工处理的方式包括：酸处理(或溶剂萃取)脱蜡(或粘土精制)相结合。
Moscow glistens with the bright lights of consumerism and Russian companies continue to queue up to list their shares on the London Stock Exchange.
消费主义在莫斯科熠熠生辉，俄国企业竞相争取在伦敦证券交易所上市。
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