About: http://webisa.webdatacommons.org/11168597

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	Transparent resins such as poly(methyl methacrylate), polystyrene and polycarbonate are mainly used at present as the plastic material for these optical devices, but these materials have problems in that the thermoplastic
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com