<http://webisa.webdatacommons.org/99772451>	<http://www.w3.org/ns/prov#value>	"If the light shielding plates 350, 430 and variable diaphragms 440 (441A???441D etc.) are formed by metallic material such as aluminium having a high optical reflectance, excellent heat resistance can be obtained so that a long period use under high brightness becomes possible." .
<http://webisa.webdatacommons.org/99772451>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/prov/409497995>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/99772451> .
<http://webisa.webdatacommons.org/99772451>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .