PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The MarSurf?? One app interfaces via Bluetooth?? with a Mahr RD 18 drive unit and probe to measure such roughness parameters as Ra, Rz, Rmax, Rt, and Rq.
http://www.w3.org/ns/prov#wasQuotedFrom
  • thefabricator.com