About: http://webisa.webdatacommons.org/200214563

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	They necessarily entail welding, casting, or other relatively complex metal working or wheel construction skills, tools and materials.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com