About: http://webisa.webdatacommons.org/44270984

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	Referring now to the drawings and particularly to FIGS. 1A-1B, a cement head and plug assembly is thereshown and generally designated by the numeral 10.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es