| 1. | When an object shape is nearly symmetrical and the non - symmetrical part has been shown clearly by other views , it could be drawn by half - section
可将投射方向一致的几个对称图形各取一半（或四分之一）合并成一个图形。此时应在剖视图附近标出相应的剖视图名称。 |
| 2. | The symmetrical part uses the source distribution on the center plane of the body whereas the asymmetrical part is achieved through the doublet distribution on the camber surface
求解完毕得到速度势后，对其求一阶导数得到物面上的速度分布，进而通过伯努利方程求出物面上的压力分布。 |
| 3. | The view of symmetrical part can be drawn a half or quarter part , and two continuous thin lines paralleling to each other should be drawn on the two ends of the perpendicular center line , as shown in fig . 12
当机件上具有相同的结构要素（如孔、槽）并按一定规律分布时，只需要画出几个完整的结构，其余的可用细实线连接或画出他们的中心位置，并在图中注明其总数，如图12所示。 |
| 4. | According to the specific characteristics of the precise forming of axially symmetrical parts , the engineering knowledge has been classified into several kinds classifies with the method of the knowledge representation techniques fir the different kinds of knowledge module proposed
摘要根据回转体零件的精密成形设计特点，对设计过程中的知识进行了分类，并对各种知识模块提出了具体的表示方法，最后通过具体事例应用验证了知识表示的有效性。 |
| 5. | Cylindrical cup is a typical axial symmetrical part , though the deformation of material is simple in drawing process , but during the drawing process , exists a lot of influence factors ( including workpiece material character itself as well as each technological parameters ) , and they restrict mutually between the factors . so how to calculate the limiting drawing rate of a cup becomes a complicated nonlinear and multi - gene question . to predicting limiting drawing rate of the cylindrical cup accurately indeed is a very complex subject
筒形件是典型的轴对称拉深件，在拉深过程中材料的变形虽然相对简单，但是在生产过程中，由于影响因素很多（包括工件材料本身性能以及各个工艺参数） ，且各种因素之间相互制约，故如何准确地计算筒形件拉深极限就成为一个复杂的非线性多因子问题，要真正准确预测筒形件极限拉深系数也是一个非常复杂的课题。 |
| 6. | The compact support wavelet which is real and orthogonal isdivided into two parts : symmetrical part and anti - symmetrical one . it proves that both the two parts are still made into compact orthogonal wavelet base which are symmetrical and anti - symmetrical respectively . it proves that symmetrical part and anti - symmetrical one of scale function are scale function and wavelet function in some subspace respectively
本文提出一种新的对称化方法，把一大类紧支集实值的非对称正交小波函数分解成对称和反对称两部分，并证明了其相应的两部分仍然构成对称和反对称的紧支正交小波基，而且我们发现尺度函数对称和反对称部分分别是某子空间的尺度函数和小波函数。 |
