Abstract
There are a lot of operations that should be remembered to draw by 3D CAD, and these acquired operations is forgotten easily if it doesn't use it for a while. Because the course of CAD has been held by the one-way traffic of simple visual and sound information from the lecturer to those who attend a lecture so far, it is not easy to remain in the impression. So we made the following hypotheses. "The storage efficiency of a complex operation of CAD rises further by repeating the practice to use repetition, sense of touch and smell. And in this case, the practice that not only information from the lecturer but also own information took is important. In this paper." CAD training room to proved this hypothesis was made, and new knowledge were obtained.
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