Just as in the freestyle, head positioning plays an important roll in the backstroke.

和自由泳一样，头部的位置对于仰泳来说也是至关重要的。

youdao

The split morph can be used as precision positioner, especially as the secondary actuator in dual stage head positioning servo system of high density hard disk drives.

该分割电极压电致动器可用于精密定位，尤其适合在高密度硬磁盘驱动器的磁头定位两级伺服系统中作第二级致动器。

youdao

The main circuits of a magnetic head positioning system with a density of 8 tracks per millimeter (TPM) based on a 4 TPM system are described with the performance of the system analysed and discussed.

本文介绍了一个磁道密度为每毫米八道的磁头定位系统，该系统是将每毫米四道的系统加以改进而得。文中给出了该系统的主要电路，并对系统的性能进行了分析和讨论。

youdao

The AL13SE is the first 10, 000 RPM class model enterprise drive from Toshiba to achieve 900GB capacity and is also the first of Toshiba's 10, 000 RPM drives to employ a dual-stage head positioning actuator that provides additional performance gains, including a 32% increase in sustained transfer rate.

ENGADGET: Toshiba's new 2.5-inch AL13SE hard drives: up to 900GB of 10,500RPM storage

As well as appeasing citizens today, both Socialist leader (and head of the crisis government) George Papandreou, as well as New Democracy party head Antonis Samaras, are positioning for elections expected in April (no date yet set for the vote).

FORBES: All Politics Are Greek