About: http://webisa.webdatacommons.org/21017959

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 removable mechanical tissue expansion appliance according to claim 1, wherein said valve is a one-way check valve having a cylindrical plug for sealing and terminating communication between said cylinder and said operating means.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca