About: http://webisa.webdatacommons.org/245337161

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	As can be seen most clearly in FIGS. 21 a and 21 b, the drive roll 223 includes a central smooth friction surface 225 formed of a material such as rubber or hard plastic.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es