About: http://webisa.webdatacommons.org/385312736

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	The graduated indicator scale 12, shown in detail in FIGS. 4 and 5, is also preferably constructed of a polymeric material, such as polyethylene or polyvinylchloride.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com