Through analyzing the preliminary design scheme of original water conveyance project, this paper makes comparison and selection of several schemes, and determines the water conveyance scheme.
通过对原输水工程初步设计方案的分析，对多个方案进行了比选，并确定了输水方案。
In the preliminary design phase of engine, engine configurations must be analyzed and assessed to choose main design parameters and to select optimal engine scheme from multiple candidates.
在发动机初步设计阶段，要根据对发动机的构型方案进行分析与评价，来选择发动机主要设计参数，并从多个发动机方案中选择最佳方案。
Against the background of variant design of satellite payload preliminary scheme, a phasic progress on emergency design method in the case of man-made or natural disasters was reported.
以卫星有效载荷总体方案变型设计为背景，探讨在人为或自然灾害的非正常情况下的应急设计方法。
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