On the basis of making the achievement previously, it was suggested and perfected what the types of the plane unilateral and bi-directional and spatialmapping infinite element.
在早先取得成果的基础上，提出并完善了平面单向、双向映射无限元及空间映射无限单元的类型。
3
Figure 11-12: clear spatialmapping. On this stovetop, it is clear which knob maps to which burner because the spatial arrangement of knobs clearly associates each knob with a burner.