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考察了稠化剂和复合剂对100℃运动粘度和低温表现粘度的影响。根据油品高低温性能的变化规律，提出了多级内燃机油合理的、经济的调制方法。
The effects of thickening agent and compounding agent on kinematic viscosity at 100 ℃ and viscosity at low temperature were investigated. According to the variation law of high and low temperature oil properties, a reasonable and economical modulation method of multi-stage internal combustion engine oil is proposed.