The mathematic model of these system has the form of triangular system.
该系统的数学模型满足“三角形系统”形式。
Therefore, a triangular model of aerodynamic design system is put forward to improve the design system.
为加强二者之间的关联，提出了气动设计体系三角形概念。
Therefore, a triangular model of aerodynamic design system is put forward to improve the design system.
为加强二者之间的关联，提出了气动设计体系三角形概念。
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