About: http://webisa.webdatacommons.org/213328756

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	Fixedly supported by and at the top of housing 10, and around its periphery, is a substantially fiat or planar diaphragm 11 which may be constructed of any suitable plastic or other readily flexible material.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com