<http://schema.org/description>
"In the 1980s, digital electric indicators were expected to blow mechanical dial indicators out of the water. Despite electronic indicators\u2019 higher resolutions, better accuracy and usefulness in statistical process control and data collection systems, mechanical indicators retained other advantages and continued to be specified by many users."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mmsonline.com/columns/dial-vs-digital-indicators>