About: http://webisa.webdatacommons.org/158531031

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	Of course, openings can be provided to allow fasteners to pass therethrough, such as bolts or the like.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com