... , writing switches quickly, operation easy.3. Equipped with two sets of hard disk drives which capacity over 40GB, ... once, fault repairs doesn’t need wait4. Equipped with CD-ROM, which grade is 52 and above, can ... , to prevent error data input, resulting in the machine damage.14. Can store the workpiece data to disk ... it can become a backup data.15. Equipped with CD-RW, which is more than 52 × level, can ...