General pneumatic electromagnetic guide, the process of performing actions cylinder can also be manually controlled pilot valve cylinderprocess of the implementation of the action.
一般气动是电磁先导、气缸执行动作的过程，也可用手控制先导阀气缸执行动作的过程。
3
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.