Then check out the rest of the machines on our list. (geekwrapped.com)
As it accelerates, depending on the design of the rest of the machine, it might reach a resonant frequency. (sciencedaily.com)
For example, a used computer hard disk drive (HDD) can pose an obvious threat to data loss, but the rest of the machine may be fully serviceable and safe to re-use with a new HDD - or even with the original one securely erased using Government CESG approved software. (qaeducation.co.uk)