Three-dimensional numerical simulation method is used in the design of a diesel engines helical intake port for the practical product.
以实际产品为研究对象，将三维数值模拟方法应用于柴油机螺旋进气道的改进设计中。
Three-dimensional form design is the foundation of the professional designs, such as environment design, product design and package design.
立体形态设计是环境设计、产品设计、包装设计等专业设计的重要基础。
And then the math formulae for three dimensional moulding of a special section member with space curves have been derived which could be used for product design and development of drawing software.
据此，推出具有空间曲线的异型截面构件的三维造型数学公式，可供产品设计及绘图软件二次开发使用。
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