About: http://webisa.webdatacommons.org/212255269

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	Hydraulic/pneumatic cylinders, springs, elastic bands or other suitable devices may be used as the resistance means and are selectively variable for both the upper and lower sets of levers independently.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk