This paper presents a solution to the "Spriug 1980 Puzzle" published in U. S. "EngineeringDesignGraphics Journal".
本文对英国“工程设计图学杂志”1980年春季难题提出了解法。
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Computer graphics hardly exist. No more pictures of a rotating auto chassis, no visual engineeringdesign, no CAD (computer - aided design) for buildings, kitchens, highways, etc.
The steel structure design CAD is a complicated and huge system project dealing with Mathematics, Engineering Mechanics, Architecture and Computer Graphics.