About: http://webisa.webdatacommons.org/29316082

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	Advantageously, the particle stream 30, directed at the surface 22 at an approximate angle ??, helps to keep the lens cover 20 of the housing 12 clean from debris and other foreign matter that might otherwise accumulate thereon.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca