About: http://webisa.webdatacommons.org/454764063

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	FIG. 7 illustrates a further embodiment of the invention including a piston and a means for detachably securing the device to a stationary object.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com