Metallic materials are used in various sizes from airplanes to micromachines that would fit on the head of a pin. This image shows metallic gears in a micromachine. The size of the components are measured in micrometers (1 millionth of a meter).
A computer hard disk drive reliably stores
and retrieves computer data on nanoscale regions of the disk. Most
of the drive and its components are made of metal.
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