track density

the track density is 48 tpi and the number of tracks is 77.

磁道密度是48道／英寸，磁道数是77。

The high sensitive laser interferometer of checking minuteness phase shift 0.2 ° was built using the way of heterodyne and phase track. The line mass-density of gas puff Z-pinch load was measured.

介绍了采用外差式记录系统和相位跟踪方法建立的高灵敏度（0.2°）迈克尔逊激光干涉系统对Z-pinch喷气负载质量线密度的测量。

Mini Piezoelectric Actuator for Rigid Disk Drives with High Track Density

高密度硬磁盘用小型压电致动器

Track density can be greatly enhanced by employing optical servo technology in a disk drive.

在磁盘驱动器中借助光伺服技术可以大幅度提高道密度.

Theoretical analysis of read back process of high track density perpendicular recording single-pole-head are presented here.

本文对高道密度垂直磁记录单极头的读出过程进行了理论分析.

The characteristics of high-speed railway are high speed and high density, as railway track is an important railway transportation technical equipment, high-speed railway requires railway track structure have high ride comfort, high stability and reliability.

高速铁路的特点是高速度和高密度，轨道作为铁路运输的重要技术设备，因而要求轨道结构必须具备高平顺性、高稳定性和高可靠性。