About: http://webisa.webdatacommons.org/335701696

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	Suitable materials for the membrane 33' include plastics films such as polyester, particularly materials which are highly slippery so as to reduce frictional forces between the camming surfaces 5' and the membrane.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com