About: http://webisa.webdatacommons.org/304309634

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 main body of the block is further provided with a hollow portion 16 which in shape is an abbreviated cylinder opening towards the rear of the block and the base of which is provided with an engaging projection 17 for the spring 4.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com