About: http://webisa.webdatacommons.org/138746995

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 grain size of them is desirably from 0.002 to 0.7 ??m, especially preferably from 0.005 to 0.3 ??m.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com