About: http://webisa.webdatacommons.org/281367556

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	The invention is a mechanical joining system which includes expansion and contraction allowance for pipe and pipe fittings, and which is suitable for use with either solid (one piece) or split (multi-piece) fittings.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com