Essential oils in the pure state are too highly concentrated to be used directly on the skin , therefore , dilute in a carrier oils vegetable oils so that they can be massaged or rubbed on to the skin in the correct dosage 基础油基础油就是将精油加以稀释的植物油，因为纯精油的刺激性十分强烈，直接擦在皮肤上，会造成伤害，所以精油在皮肤上使用前，一定要先稀释。
Select 10w / 30 sg green lubricating oil , carry on experiment to compare its properties with the properties of mineral oil at the same level . the degradation course of 10w / 30 sg green lubricating oil and its basic oils is stress researched 选用10w 30sg绿色润滑油，将其与同级矿物油进行使用性能对比试验，重点考察了10w 30sg绿色润滑油及其基础油的生物降解过程。
Emhydr hr oils are based on high paraffin lubricant stocks compounded with rust and oxidation inhibitors and anti - foam additive to lubricate in hydraulic systems , plain and anti - friction bearings , enclosed gear cases etc . that do not require anti - wear or extreme pressure properties Emhydr hr是以石蜡基基础油掺配防锈、抗氧化与消泡添加剂制成，适用于工业液压系统、减阻与平轴承、密封式齿轮等，以及不须抗磨与极压性能的润滑系统。
The results show : its quality has already reached the properties of 10w / 30 sg gasoline engine oil ; both the green lubricating oil and its basic oil are biodegradable ; the biodegradability of the latter is superior to the former obviously . therefore function additives suppress the biodegradability of the green lubricating oil 结果表明：其质量水平已达到10w 30sg汽油机油的使用性能要求；绿色润滑油及其基础油都是可生物降解的，基础油的生物降解性明显优于绿色润滑油，由此可见各功能添加剂的加入抑制了绿色润滑油的生物降解性。
Abstract : a series of techniques producing lube base oil developed by ripp , including the technique for production of naphthenic lube oil , high viscosity base oil from sour crude and the api group base oil with viscosity index more than 120 from hydrocracking tail oil , were introduced 文摘:介绍了石油化工科学研究院开发的一系列润滑油基础油生产技术，主要有环烷基润滑油生产的工艺技术，含硫原油生产高粘度指数基础油的技术以及加氢裂化尾油制取粘度指数大于120的类基础油技术。
Metalx nc306 is a transparent oil blended from selected base stocks combined with balanced additives , it is chlorine free and specially meets the requirements of machining copper and its alloys . it is non - staining to copper and contains an effective anti - mist suppressant to provide a safe and friendly working environment 敏得力nc306是一种非氯类高性能铜切削油，由高度精炼的矿物型基础油与复合添加剂调配而成，满足铜以及铜合金加工和防锈的要求，产品不含氯，并且具备较强的抑制油雾的特性，最大程度地降低操作人员的过敏，提供安全环保的工作环境。
Detga - a sereies of bearing and circulating oils . manufactured from high viscosity index paraffinic base oils , prssessing excellent natural demulsificationnproperties . effective additives further enhance oxidation stability . recommended for applications where the extra load carrying characteristics are not required . suitable for lubrication of machine guides , bearings and spindies , aie line lubrication of maching tools , ring liled and wick feed bearings , and light duty gear and hydraulic systems 德佳-一系列轴承及循环系统油，由高粘度指数石蜡烃基础油制造，具有极佳之天然抗乳化性，有效的添加剂提高了抗氧化性能，特别推荐于轻度负荷的操作，可应用在机床导件、轴承、锭子、气动件润滑、油环及油绳润滑轴承等，甚至是轻负荷及液压系统。
Moreover , the thesis analyses the biodegradation of petroleum products , evaluates the biological degradation properties of the developed environment friendly base oil and as well the lubricant ' s biodegradation properties at actual conditions by means of self - designed soil simulation and also in water by testing bod5 / codcr values 分析了石油类产品的生物降解机理，对所研制的环境兼容基础油的生物降解性进行了评价，通过自行设计的土壤模拟法评价了润滑油在实际环境中的生物降解性，采用测bod _ 5 cod _ ( cr )值法来评价润滑油在水中的生物降解性。
The development status and trend of gasoline engine oil at home and abroad are described in this paper . the tribology and lubrication characteristic and lubrication mechanism of the main tribo - pairs of gasoline engine are analyzed simply . in this paper base oil and some additives are chosen reasonably according to the lubricantions principal and a lot of data . the uniform design of experiment is used to arrange multi - level and multi - factor experiments . the stepwise technique is adopted to analyze the result . the sensitivity and compatibility among additives and the base oil are studied by a series of tests . on the basis of analyzing the low temperature capability the optimum of 15w / 40 sh gasoline engine oil is presented . at last , the property of this formulation is evaluated by comparing with the imports . the test result shows that their qualities are equivalent 本文介绍了国内外汽油机油的发展现状以及发展趋势，通过分析汽油机主要摩擦副的摩擦磨损特性和润滑状态以及汽油机对润滑油的性能要求，在润滑理论的指导下和参阅大量资料的基础上，合理地选择基础油和添加剂。本文用均匀实验设计安排实验，用逐步回归技术进行结果处理，分析了基础油对添加剂的感受性和添加剂之间的配伍性。在重点考察汽油机油低温性能的基础上，提出了15w 40sh级汽油机油的优化配方。
By analyzing the biodegradable engine oil ' s demands on the lubrication mechanism and biodegradable performance , base oil and some additives are chosen scientifically and reasonably . the uniform design of experiment is used for arranging multi - level and multi - factor experiments . the stepwise technique is adopted to put forward the regression equation 通过分析可生物降解润滑油在润滑性能和生物降解性能两方面的要求，合理的选用基础油和添加剂，并引进均匀设计方法，合理的安排多水平多因素试验，用逐步回归对试验结果进行处理，得出回归方程，以此分析基础油对添加剂的感受性、添加剂间的配伍性。
