About: http://webisa.webdatacommons.org/317031552

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	End piece 40 is preferably a smooth, spherical ball having a diameter of 10-100 ??m, in particular about 40-60 ??m, for example about 50 ??m.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com