To find the surface element together with a normal vector, I would just take the cross-product between these guys.
为了找到带法向量的面元，我就取这两个的叉积。
Vector dS is a vector which points perpendicular to the surface and whose length corresponds to the surface element.
向量dS与曲面垂直,并且它的长度与面积元素有关。
XPS applied to study the surface element content changes before and after the copolymer added.
利用X光电子能谱（XPS）研究共聚物添加前后在煤粉表面元素含量的变化；
In this paper the lattice spot theory for moment-method solution is presented. A new concept of fuzzy surface element is introduced. Some numerical results are given.
本文介绍了格点理论在矩量法中的应用。引入了格点的模糊面积元概念。文中还给出了数据实例。
It USES the image element of the part instead of the surface element of part and identifies each image element to get the integral result of rotational inertia by the aid of computer.
提出一种求形状复杂的平板薄型机械零件对任意转轴的转动惯量新方法，该方法用零件图像的像素代表零件的面元，通过计算机对其识别和计算来实现对转轴转动惯量的求积。
It USES the image element of the part instead of the surface element of part and identifies each image element to get the integral result of rotational inertia by the aid of computer.
提出一种求形状复杂的平板薄型机械零件对任意转轴的转动惯量新方法，该方法用零件图像的像素代表零件的面元，通过计算机对其识别和计算来实现对转轴转动惯量的求积。
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