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。
Simultaneously all the main parameters are determined according to the environment of fuselage airproof main frame and the design requirements in analyzing the rigidity and strength.
根据承力密封框的使用环境和设计要求，确定了对其进行刚度和强度分析时所需的各种主要参数；
This paper introduces the related content of clean room air-conditioning system design of magnetic head factory, gives main design parameters and air-conditioning system type of clean room.
本文介绍磁头生产厂洁净空调系统设计的有关内容，给出了洁净空调主要设计参数、空调系统型式。
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