All PC systems start the boot process by executing code in ROM (specifically, the BIOS) to load the sector from sector 0, cylinder 0 of the boot drive.
所有的PC系统都是通过执行rom(明确地说，BIOS)中的代码从引导磁盘的0柱面0扇区加载扇区，从而开始引导过程。
Hydraulic pressure refers to the lift in the process of power source and transmission, hydraulic transmission is the most important part of the hydraulic cylinder.
液压是指升降机在升降过程中的动力来源及传动方式，液压传动固然离不开最重要的部位—液压油缸。
The driver moves the piston inside the cylinder, alternately pulling in and pushing out the process fluid (Fig. ).
原动机驱动在汽缸内的活塞，交替地吸入和排出工艺流体（图）。
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