About: http://webisa.webdatacommons.org/7797973

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	When programming the delay times using conventional methods, one or more field technicians must find the locations of the boreholes by referring to a map or other plan, and then program the detonators contained therein.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com