... operating system, the speed is fast and steady, with throttle control, so that the two-axis bend ... interface, writing switches quickly, operation easy.3. Equipped with two sets of hard disk drives which capacity over ... once, fault repairs doesn’t need wait4. Equipped with CD-ROM, which grade is 52 and above, can ... so it can become a backup data.15. Equipped with CD-RW, which is more than 52 × level, can ...