About: http://webisa.webdatacommons.org/283343508

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 force with which the ear muff is pressed against the head, i.e. the pressing force, shall be substantially constant for head sizes which vary between a minimum value and a maximum value.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk