About: http://webisa.webdatacommons.org/51530583

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 holder sections 621 and 622 may be made from an appropriate material such as aluminum or steel and be in the order of ?????? to ?????? thick.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com