About: http://webisa.webdatacommons.org/288124564

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 holes 158 and 160 are ground and lapped to snugly yet `Slidably receive the respective balls 162 or 164 which are of high precision bearing ball dimensions and material, such as hardened steel.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com