<http://webisa.webdatacommons.org/139652729>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/139652729>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<pumpsandsystems.com> .
<http://webisa.webdatacommons.org/prov/478513502>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/139652729> .
<http://webisa.webdatacommons.org/139652729>	<http://www.w3.org/ns/prov#value>	"As friction and other factors restrict its flow, the forward portion of the column can act as the initial barrier and give rise to water hammer." .