About: http://webisa.webdatacommons.org/324115259

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	Abutments 52, 54 may be injection molded out of plastic or made of another material such as wood or metal.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com