而口内测量由于操作的限制，很难实现对一定时期内牙磨耗量的精确测量。
Confined by the operation condition, intra-oral measurement can't make a precise result of tooth wear in a period.
结论：自行开发研制的计算机三维辅助测量法可以较精确、快速地实现牙磨耗量的测定。
Conclusion the 3-d computer assistant measure system can exactly accomplish the clinical tooth wear measurement.
并介绍聚苯酯填充聚四氟乙烯的三大特点：极大的权限PV值、极低的磨耗量和不损伤对磨偶件。
The three characteristics of PTFE filled with p-oxybenzoyl homopolyester are introduced, i. e. the biggest maximum PV value, the lest abrasion and outstanding kinetic friction.
试验结果表明，加入湿法白炭黑超细粉的试样拉伸强度比添加气相法白炭黑者提高了54%，扯断伸长率提高了64%，磨耗量降低了20%。
The results showed that the sample by adding the ultrafine powders of silica aerogel increased the tensile strength 54%, the elongation at break 64%, decreased the abrasion loss 20%.
分析了车辆导向轮侧滑量在允许值范围仍出现轮胎异常磨耗的原因，并讨论了前轮检测中应引起重视的几个问题。
The causes of anomalous tire wear at side slip value of front wheel keeping normal value were analysed and some problems of measuring front wheel alignment were discussed.
分析了车辆导向轮侧滑量在允许值范围仍出现轮胎异常磨耗的原因，并讨论了前轮检测中应引起重视的几个问题。
The causes of anomalous tire wear at side slip value of front wheel keeping normal value were analysed and some problems of measuring front wheel alignment were discussed.
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