About: http://webisa.webdatacommons.org/80182897

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	Mechanical means of pre-stressing may be for example screw, hydraulic, piezo-electric, magnetic and thermal expansion e g using a bimorph.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com