技术设计阶段 meaning in English

definition phase
design development phase

This research is one part of the analysis of the mobile offshore platform . the main part of it is the evaluation of the efficiency , ability and risk of the unloading / transport system according to the designing plan and the related datas supported by the design department during the step of technique designing
本研究是近海卸载平台系统研制的一个组成部分，主要研究内容是根据技术设计阶段由设计部门提供的设计方案和有关数据，对机动卸载平台系统的运行过程进行效能分析和风险分析。