About: http://webisa.webdatacommons.org/87684405

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	Each of circular grooves 28a-28m is formed at a different multiple of a basic radial distance r, where r=S'/n and n is an integer greater than 1.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com