About: http://webisa.webdatacommons.org/363901352

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	It is preferable for the polyurethane flexible foam of the present invention that its resonant frequency is less than 4 Hz, particularly not higher than 3.5 Hz.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com