根据型材挤压的特点，提出了新的流线型挤压模曲面的构造方法。
Based on the characteristics of extrusion process, a new method of constructing surface for the streamlined extrusion die is proposed in this paper.
基于流线型的列车头部外形由三维空间自由曲面构成，提出采用NURBS曲线设计外形型线和用三维nurbs曲面描述复杂三维曲面的车头外形设计方法。
The shape of streamlined train head is made of the 3-dimensional space free form surface, whose shape outline curve USES NURBS curve and complex shape surface USES 3-d NURBS surface.
电涡流线圈及其基底材料具有良好的柔顺性，可以测试任意曲面形状之间的间隙，适合安装在狭小的空间中进行测量。
The eddy-current coils and the substrate material have better flexibility so as to measure the clearance among curved faces of any form, and can be arranged in the narrow space for measurement.
电涡流线圈及其基底材料具有良好的柔顺性，可以测试任意曲面形状之间的间隙，适合安装在狭小的空间中进行测量。
The eddy-current coils and the substrate material have better flexibility so as to measure the clearance among curved faces of any form, and can be arranged in the narrow space for measurement.
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