About: http://webisa.webdatacommons.org/246921501

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 cover 320 can be made preferably of optical plastic such as PMMA (poly methyl methacrylate) or the like using injection molding.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr