<http://schema.org/description>
"Renishaw's wireless XR20-W and new off-axis rotary software work with laser interferometers to test the accuracy of lathes, multi-axis machine tools, mill-turn machines, trunnion tables and spindles."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mmsonline.com/columns/calibrating-the-rotary-axis>