About: http://webisa.webdatacommons.org/211844089

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	This relationship is a condition for the front impeller to achieve an effect of increasing flow rate and for the rear impeller to supplement a rectifying effect provided by the stationary blades.
http://www.w3.org/ns/prov#wasQuotedFrom	freshpatents.com