In the preliminary design stage, the designer emphatically considered the product should have function.
初步设计阶段，设计者着重考虑产品应该具有的功能。
To make its case, RKK Energia took the unusual step - at a preliminary design stage - of ordering the construction of an experimental propulsion system.
为了证明自己的设计有道理，安吉亚太空公司走了非同寻常的一步：在初步设计阶段，定制建设了试验性的推进系统。
Appraisement methods, which means giving the appraisal of railway construction organization variant, is an important component part of design document at the preliminary design stage.
铁路施工组织方案比选，是铁路初步设计阶段设计文件的重要组成部分。
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