About: http://webisa.webdatacommons.org/366160583

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	As for the previous embodiment, the drill stem can be kept stationary to form a spirular bore pattern as shown in FIG. 5 or the stem can be rotated in various manners to produce such patterns as shown in FIGS. 6 and 7.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca