About: http://webisa.webdatacommons.org/34541417

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 apparatus preferably further includes at least one gaseous sealing means, such as a coating of viscous sealing material applied to the outer surfaces of the pusher means and the drawstring thread.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk