About: http://webisa.webdatacommons.org/184297406

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	Block and tackles, hydraulics, and winches are the most common devices to magnify people power.Levers Increase Force and TorqueWinches use the principle of physics called Levers" to increase force and torque.
http://www.w3.org/ns/prov#wasQuotedFrom	harken.com