About: http://webisa.webdatacommons.org/317028740

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	In one preferred embodiment, P1 and P2 are set equal and the pitch P3 of the spiral rib is set to P1 ???P2 ???(1/N)P3, where N is an integer.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com