先思考一下圆柱面的法向量？
First of all, what does the normal vector to a cylinder look like?
对于这个圆柱面。
我来再次解释一下如何得出这个圆柱面的法向量。
Let me re-explain quickly how I got a normal vector for the cylinder.
用于表面、圆柱面、内部和无心磨削的直轮。
Straight wheels used for surface, cylindrical, internal, and centerless grinding.
亚历山大柱面向冬宫，耸立在圣彼得堡冬宫广场。
大径指过外螺纹牙顶或内螺纹牙底的圆柱面直径。
The root of the external thread or the crest of the inner thread .
也可以是一部分柱面加上顶面,或者是其他的不含原点的曲面。
Or, you could use a piece of cylinder plus a flat top or whatever you want but not pressing for the origin.
引导扇区总是在同一个位置—引导设备的磁道0、柱面0、磁头0。
The boot sector is always at the same place-track 0, cylinder 0, head 0 of the boot device.
各盘片上在无需移动磁头的前提下即可读取的磁道的集合称为柱面。
The collection of tracks on the various platters that can be read without moving the head is called a cylinder.
它长什么样？再次我还要重复一句，它可以是圆柱面的一部分。
What does that look like? And, again, when I say cylinder, it could be a piece of cylinder.
这转化成用于最优磁盘性能的8扇区对齐和用于旧版操作系统的柱面对齐。
This translates to 8-sector alignment for optimum disk performance as well as cylinder alignment for the older operating system.
轮齿与其分度圆柱面的交线在分度圆柱面所展开的矩形中为圆弧；
The line, at which the tooth intersects the graduated cylinder, is an arc in the developed surface of the cylinder.
这种输送链条新设计在滚子中采用了具有精密加工柱面的滚子轴承。
This kind of transportation chain link new design used in the roller had the precision sizing cylinder roller bearings.
本文用矩阵光学的方法研究了内含介质的正交柱面一柱面镜象散腔。
The astigmatic cavities bounded by crossed cylindrical mirrors with a piece of medium is studied by using matrix optics method.
本文介绍了斜等距曲面的概念，证明了柱面的斜等距曲面的一些性质。
In this paper, the concept of slant equidistant surface is introduced, some properties of cylinder are proved.
在安装方面上，基础的定位轴线和支承钢柱面标高超过规范允许偏差值。
In installation, the positioning axis of the foundation and the bearing steel cylinder elevation exceed the allowable value of the standard deviation.
splot命令默认使用的是笛卡儿坐标系，不过也可以支持球面或柱面坐标系。
The splot command is Cartesian by default but can also support spherical and cylindrical coordinates.
磨削通过采用被称为磨床的特殊机床能在平面、圆柱面甚至内表面上进行。
Grinding can be performed on flat, cylindrical, or even internal surfaces by employing specialized machine tools, which are referred to as grinding machines.
结果表明，层中波场由一系列柱面波组成，其衰减特性与围岩中的规律不同。
The results indicated that the field in the stratum is composed of a series of cylinder wave which has the attenuation different from the country rock.
某些旧系统存在限制，BIOS仅能通过全部位于磁盘的前1024个柱面中的分区引导。
Some older systems have a limitation that the BIOS can boot only from a partition that is wholly located within the first 1024 cylinders of disk.
通过2.17.2及其以上版本(我写本文时是最新版本)，默认对齐仍然是基于柱面的。
Through at least version 2.17.2 (the most recent as I write), the default alignment remains cylinder-based.
三个绿色的环表示ObjectGrid插件，而两个黄色的柱面表示外部安全服务。
The three green circles represent ObjectGrid plug-ins, and the two yellow cylinders represent external security services.
利用几何光学法和物理光学法，分析了带有双柱面紧缩场天线的微波暗室内的电磁场分布。
Using the Go and Po methods, the electromagnetic fields in a microwave anechoic chamber setting up a compact two-cylindrical antennas range are analysed in this paper.
实际的磁臂必须找到正确的柱面，控制部分需要访问正确的块，并且磁头必须等到这些块旋转到磁头下面。
The actual disk arms must find the correct cylinder, the control needs to access the correct blocks, and the disk heads have to wait while the blocks rotate to them.
在分析了几种柱面测量方法优缺点的基础上，选用柱面绝对检验方法作为测量柱面的理论基础。
This paper analyses several methods of cylindrical measures, based on their advantages and disadvantages, adopt the absolute measure's method in cylinder as the basic theory.
标记为PhysicalVolume的一个柱面上绘制了一个网格，表示上面有单独的物理分区(PP)。
One cylinder, labeled physical Volume, has a grid drawn on it to represent the individual physical partitions (PPs) on it.
如果物镜与光盘之间的距离短于物镜的焦距，柱面透镜就会使在光电探测器阵列上的成像变成椭圆影像。
If the objective lens is closer to the compact disk than the focal length of the object lens then the cylindrical lens creates an elliptical image on the photodetector array.
如果物镜与光盘之间的距离短于物镜的焦距，柱面透镜就会使在光电探测器阵列上的成像变成椭圆影像。
If the objective lens is closer to the compact disk than the focal length of the object lens, then the cylindrical lens creates an elliptical image on the photodetector array.
如果物镜与光盘之间的距离长于物镜的焦距，柱面透镜也会使在光电探测器阵列上的成像变成椭圆影像。
If the objective lens is further away from the compact disk than the focal length of the object lens then the cylindrical lens again creates an elliptical image on the photodetector array.
如果物镜与光盘之间的距离长于物镜的焦距，柱面透镜也会使在光电探测器阵列上的成像变成椭圆影像。
If the objective lens is further away from the compact disk than the focal length of the object lens then the cylindrical lens again creates an elliptical image on the photodetector array.
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