About: http://webisa.webdatacommons.org/67525071

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 period is a reciprocal number of a vertical deflection frequency fV.) is generated by H.V. supplied to the anode of the cathode-ray tube 1. (See FIG. 3C.)
http://www.w3.org/ns/prov#wasQuotedFrom	google.com