Solid rocket motor design is a complicated systems engineering.
固体火箭发动机设计是一项复杂的系统工程。
At the same time, the engineering department made shells of the solid models.
同时，工程部门制作实体模型的外壳。
The end, used engineering solid the example carry on first step verification.
最后运用工程实例进行实证分析。
The end, used engineering solid the example carry on first step verification.
最后运用工程实例进行实证分析。
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