About: http://webisa.webdatacommons.org/433387311

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	Because of the elaborate processes involved in shaping one surface against the other and the use of multiple feedback control systems to maintain parallelism, this design approach is a challenge to manufacture at a low cost.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com