About: http://webisa.webdatacommons.org/338001930

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	Thus, there is a problem with the prior art device for rotating the transducer of an ultrasonic probe since the manufacturing process of such a device is quite complex.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com