About: http://webisa.webdatacommons.org/443715822

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 air tight valve 616 according to the present embodiment is made of a material such as a silicon rubber, a natural rubber, or an isopropylene rubber, and is fixed to tubes 37, 73 by using an adhesive material.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com