About: http://webisa.webdatacommons.org/2054669

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	Rock Cutting and Vertical Penetration Models A standard drill bit usually exhibits two kinds of motions: rotational along its axis of rotation and vertical motion while penetrating through the rocks.
http://www.w3.org/ns/prov#wasQuotedFrom	hindawi.com