About: http://webisa.webdatacommons.org/133546611

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	Although such prior art arrangements are effective to match the resonant frequency of the balance bar to that of the flow tube, the use of mechanical expedients, such as added weights, results in a cumbersome and expensive structure.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com