About: http://webisa.webdatacommons.org/261528018

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	Accordingly, there is a need to provide a mine roof support that limits the extent a bolt head protrudes beyond a roofline of a tunnel.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com