About: http://webisa.webdatacommons.org/308663042

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	In contrast, when the ultimate gas pressure is lower than 0.5???10???2 Pa, especially lower than 0.2???10???2 Pa, the heat treatment time required until reflectance is saturated is short, which is advantageous in mass manufacture.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca