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.

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.

并针对叶片主干部分的椭圆柱面，分别推导其测地线和非测地线的微分方程序。

For the elliptic cylindrical surface which is the trunk of the blade, the geodesic and non-geodesic differential equations are deduced.

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.