About: http://webisa.webdatacommons.org/2760395

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	Further, there is a need for a cementing head in which any plug release plungers may be operated without stopping reciprocation and/or rotation of the assembly.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com