About: http://webisa.webdatacommons.org/9400909

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In one desirable embodiment, the rotatable planar member on which the crystal rests is a separate component from the rotatable member and is adapted to be fitted to a rotatable entity of a known apparatus by any convenient means.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es