About: http://webisa.webdatacommons.org/397379729

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	The diaphragm is preferrably made of material such as silicon, sapphire, germanium or other semi-conductor or a suitable ceramic material.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr