<http://webisa.webdatacommons.org/prov/132594838>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/283479349> .
<http://webisa.webdatacommons.org/283479349>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<science.gov> .
<http://webisa.webdatacommons.org/283479349>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/283479349>	<http://www.w3.org/ns/prov#value>	"The apparatus comprises a reservoir or other source for supplying the working fluid to the piping system, a launch tube for admitting the device into the launcher and a reversible, positive displacement pump for controlling the direction and flow rate of the working fluid." .