About: http://webisa.webdatacommons.org/199471460

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	However, since a realizable vibration frequency is normally low in a range of about tens kHz to hundreds kHz, in particular, several MHz at most, there is a problem in that higher frequency of the vibration body is difficult.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com