About: http://webisa.webdatacommons.org/283344521

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 plastics material is preferably substantially transparent, the size and density of the bubbles being selected such as to enable material flowing along the device to be viewed by the eye.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com