About: http://webisa.webdatacommons.org/451436425

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	On account of this, the acoustic matching layer 8 is composed of a composite material formed by combining a plurality of kinds of materials each of which has a different acoustic impedance.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk