发射总重量的评价准则综合考虑了系统质量和阻力面积，能够全面反映系统的经济性能，可以得到很好的优化结果。
The results indicated that total launched weight is a effective assessing criterion which can combine both system mass and resistance area into a unified criterion.
一是提出了科学确定修理周期要求，在参考线路累计通过总重的基础上，应用工程类比分析法和经济寿命分析法进行综合分析确定；
On the base of the reference of track total passing weight, the analysing methods of engineering analogy and economy life-span are put forword.
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