About: http://webisa.webdatacommons.org/125629956

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	Polishing agents are also used to polish optical elements such as lenses and mirrors to a surface smoothness within a fraction of the wavelength of the light they are to manage.
http://www.w3.org/ns/prov#wasQuotedFrom	sumobrain.com