About: http://webisa.webdatacommons.org/38415556

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 columns with the pressure restriction means may be coated on the outside thereof with a single layer or with multiple layers of a organic polymer, e.g. polyimide, metal, salt or another polymeric or ceramic material.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk